diff --git a/changelog.d/6884.bugfix b/changelog.d/6884.bugfix
new file mode 100644
index 00000000000..6c6b2866886
--- /dev/null
+++ b/changelog.d/6884.bugfix
@@ -0,0 +1 @@
+Ensure SyncThread is started when the app is launched after a Push has been received.
diff --git a/changelog.d/6884.sdk b/changelog.d/6884.sdk
new file mode 100644
index 00000000000..0de43420f0e
--- /dev/null
+++ b/changelog.d/6884.sdk
@@ -0,0 +1 @@
+Rename `DebugService.logDbUsageInfo` (resp. `Session.logDbUsageInfo`) to `DebugService.getDbUsageInfo` (resp. `Session.getDbUsageInfo`) and return a String instead of logging. The caller may want to log the String.
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/debug/DebugService.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/debug/DebugService.kt
index d0cee08831d..7f5e4f2ee7c 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/debug/DebugService.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/debug/DebugService.kt
@@ -28,7 +28,7 @@ interface DebugService {
     fun getAllRealmConfigurations(): List<RealmConfiguration>
 
     /**
-     * Prints out info on DB size to logcat.
+     * Get info on DB size.
      */
-    fun logDbUsageInfo()
+    fun getDbUsageInfo(): String
 }
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/Session.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/Session.kt
index 63c1c25130d..13993149f4e 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/Session.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/Session.kt
@@ -323,9 +323,9 @@ interface Session {
     fun getUiaSsoFallbackUrl(authenticationSessionId: String): String
 
     /**
-     * Debug API, will print out info on DB size to logcat.
+     * Debug API, will return info about the DB.
      */
-    fun logDbUsageInfo()
+    fun getDbUsageInfo(): String
 
     /**
      * Debug API, return the list of all RealmConfiguration used by this session.
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/sync/SyncService.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/sync/SyncService.kt
index 71f7ab8494b..6640b8a9af6 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/sync/SyncService.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/sync/SyncService.kt
@@ -53,6 +53,11 @@ interface SyncService {
      */
     fun getSyncState(): SyncState
 
+    /**
+     * This method returns true if the sync thread is alive, i.e. started.
+     */
+    fun isSyncThreadAlive(): Boolean
+
     /**
      * This method allows to listen the sync state.
      * @return a [LiveData] of [SyncState].
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/database/RealmLiveEntityObserver.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/database/RealmLiveEntityObserver.kt
index f2f88e216bc..020b42b3b84 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/database/RealmLiveEntityObserver.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/database/RealmLiveEntityObserver.kt
@@ -38,7 +38,7 @@ internal abstract class RealmLiveEntityObserver<T : RealmObject>(protected val r
         LiveEntityObserver, RealmChangeListener<RealmResults<T>> {
 
     private companion object {
-        val BACKGROUND_HANDLER = createBackgroundHandler("LIVE_ENTITY_BACKGROUND")
+        val BACKGROUND_HANDLER = createBackgroundHandler("Matrix-LIVE_ENTITY_BACKGROUND")
     }
 
     protected val observerScope = CoroutineScope(SupervisorJob() + BACKGROUND_HANDLER.asCoroutineDispatcher())
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/database/tools/RealmDebugTools.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/database/tools/RealmDebugTools.kt
index dc20549eb3e..2e9c3303d4a 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/database/tools/RealmDebugTools.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/database/tools/RealmDebugTools.kt
@@ -19,16 +19,15 @@ package org.matrix.android.sdk.internal.database.tools
 import io.realm.Realm
 import io.realm.RealmConfiguration
 import org.matrix.android.sdk.BuildConfig
-import timber.log.Timber
 
 internal class RealmDebugTools(
         private val realmConfiguration: RealmConfiguration
 ) {
     /**
-     * Log info about the DB.
+     * Get info about the DB.
      */
-    fun logInfo(baseName: String) {
-        buildString {
+    fun getInfo(baseName: String): String {
+        return buildString {
             append("\n$baseName Realm located at : ${realmConfiguration.realmDirectory}/${realmConfiguration.realmFileName}")
 
             if (BuildConfig.LOG_PRIVATE_DATA) {
@@ -54,7 +53,6 @@ internal class RealmDebugTools(
                 separator()
             }
         }
-                .let { Timber.i(it) }
     }
 
     private fun StringBuilder.separator() = append("\n==============================================")
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/debug/DefaultDebugService.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/debug/DefaultDebugService.kt
index 3f2e6fafc88..46479c3db65 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/debug/DefaultDebugService.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/debug/DefaultDebugService.kt
@@ -36,9 +36,9 @@ internal class DefaultDebugService @Inject constructor(
                 realmConfigurationGlobal
     }
 
-    override fun logDbUsageInfo() {
-        RealmDebugTools(realmConfigurationAuth).logInfo("Auth")
-        RealmDebugTools(realmConfigurationGlobal).logInfo("Global")
-        sessionManager.getLastSession()?.logDbUsageInfo()
+    override fun getDbUsageInfo() = buildString {
+        append(RealmDebugTools(realmConfigurationAuth).getInfo("Auth"))
+        append(RealmDebugTools(realmConfigurationGlobal).getInfo("Global"))
+        append(sessionManager.getLastSession()?.getDbUsageInfo())
     }
 }
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/di/MatrixModule.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/di/MatrixModule.kt
index 49713a1d7f3..f2f8a5dc044 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/di/MatrixModule.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/di/MatrixModule.kt
@@ -40,7 +40,7 @@ internal object MatrixModule {
                 io = Dispatchers.IO,
                 computation = Dispatchers.Default,
                 main = Dispatchers.Main,
-                crypto = createBackgroundHandler("Crypto_Thread").asCoroutineDispatcher(),
+                crypto = createBackgroundHandler("Matrix-Crypto_Thread").asCoroutineDispatcher(),
                 dmVerif = Executors.newSingleThreadExecutor().asCoroutineDispatcher()
         )
     }
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/DefaultSession.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/DefaultSession.kt
index 57db187bdc8..679c5085efc 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/DefaultSession.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/DefaultSession.kt
@@ -263,11 +263,11 @@ internal class DefaultSession @Inject constructor(
         }
     }
 
-    override fun logDbUsageInfo() {
-        RealmDebugTools(realmConfiguration).logInfo("Session")
-        RealmDebugTools(realmConfigurationCrypto).logInfo("Crypto")
-        RealmDebugTools(realmConfigurationIdentity).logInfo("Identity")
-        RealmDebugTools(realmConfigurationContentScanner).logInfo("ContentScanner")
+    override fun getDbUsageInfo() = buildString {
+        append(RealmDebugTools(realmConfiguration).getInfo("Session"))
+        append(RealmDebugTools(realmConfigurationCrypto).getInfo("Crypto"))
+        append(RealmDebugTools(realmConfigurationIdentity).getInfo("Identity"))
+        append(RealmDebugTools(realmConfigurationContentScanner).getInfo("ContentScanner"))
     }
 
     override fun getRealmConfigurations(): List<RealmConfiguration> {
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/send/queue/EventSenderProcessorThread.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/send/queue/EventSenderProcessorThread.kt
index 51107c96557..55363a72510 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/send/queue/EventSenderProcessorThread.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/send/queue/EventSenderProcessorThread.kt
@@ -55,7 +55,7 @@ internal class EventSenderProcessorThread @Inject constructor(
         private val queuedTaskFactory: QueuedTaskFactory,
         private val taskExecutor: TaskExecutor,
         private val memento: QueueMemento
-) : Thread("SENDER_THREAD_SID_${sessionParams.credentials.sessionId()}"), EventSenderProcessor {
+) : Thread("Matrix-SENDER_THREAD_SID_${sessionParams.credentials.sessionId()}"), EventSenderProcessor {
 
     private fun markAsManaged(task: QueuedTask) {
         memento.track(task)
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/timeline/DefaultTimeline.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/timeline/DefaultTimeline.kt
index 4eaac67e5ae..c380ccf14f8 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/timeline/DefaultTimeline.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/timeline/DefaultTimeline.kt
@@ -76,7 +76,7 @@ internal class DefaultTimeline(
 ) : Timeline {
 
     companion object {
-        val BACKGROUND_HANDLER = createBackgroundHandler("DefaultTimeline_Thread")
+        val BACKGROUND_HANDLER = createBackgroundHandler("Matrix-DefaultTimeline_Thread")
     }
 
     override val timelineID = UUID.randomUUID().toString()
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/sync/DefaultSyncService.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/sync/DefaultSyncService.kt
index 691dd7b20d3..76c3c38abf6 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/sync/DefaultSyncService.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/sync/DefaultSyncService.kt
@@ -73,6 +73,8 @@ internal class DefaultSyncService @Inject constructor(
 
     override fun getSyncState() = getSyncThread().currentState()
 
+    override fun isSyncThreadAlive() = getSyncThread().isAlive
+
     override fun getSyncRequestStateFlow() = syncRequestStateTracker.syncRequestState
 
     override fun hasAlreadySynced(): Boolean {
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/sync/job/SyncThread.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/sync/job/SyncThread.kt
index 24a60a80da6..b47b2156552 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/sync/job/SyncThread.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/sync/job/SyncThread.kt
@@ -62,7 +62,7 @@ internal class SyncThread @Inject constructor(
         private val backgroundDetectionObserver: BackgroundDetectionObserver,
         private val activeCallHandler: ActiveCallHandler,
         private val lightweightSettingsStorage: DefaultLightweightSettingsStorage
-) : Thread("SyncThread"), NetworkConnectivityChecker.Listener, BackgroundDetectionObserver.Listener {
+) : Thread("Matrix-SyncThread"), NetworkConnectivityChecker.Listener, BackgroundDetectionObserver.Listener {
 
     private var state: SyncState = SyncState.Idle
     private var liveState = MutableLiveData(state)
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/util/BackgroundDetectionObserver.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/util/BackgroundDetectionObserver.kt
index 901d0eca8fb..dea5f131b9b 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/util/BackgroundDetectionObserver.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/util/BackgroundDetectionObserver.kt
@@ -49,13 +49,13 @@ internal class DefaultBackgroundDetectionObserver : BackgroundDetectionObserver
     }
 
     override fun onStart(owner: LifecycleOwner) {
-        Timber.v("App returning to foreground…")
+        Timber.d("App returning to foreground…")
         isInBackground = false
         listeners.forEach { it.onMoveToForeground() }
     }
 
     override fun onStop(owner: LifecycleOwner) {
-        Timber.v("App going to background…")
+        Timber.d("App going to background…")
         isInBackground = true
         listeners.forEach { it.onMoveToBackground() }
     }
diff --git a/vector/src/main/java/im/vector/app/VectorApplication.kt b/vector/src/main/java/im/vector/app/VectorApplication.kt
index 4655de73773..46cb6ec79b2 100644
--- a/vector/src/main/java/im/vector/app/VectorApplication.kt
+++ b/vector/src/main/java/im/vector/app/VectorApplication.kt
@@ -266,7 +266,7 @@ class VectorApplication :
     }
 
     private fun createFontThreadHandler(): Handler {
-        val handlerThread = HandlerThread("fonts")
+        val handlerThread = HandlerThread("Vector-fonts")
         handlerThread.start()
         return Handler(handlerThread.looper)
     }
diff --git a/vector/src/main/java/im/vector/app/core/di/ActiveSessionHolder.kt b/vector/src/main/java/im/vector/app/core/di/ActiveSessionHolder.kt
index 7a1d613ab93..bb2ca97aad1 100644
--- a/vector/src/main/java/im/vector/app/core/di/ActiveSessionHolder.kt
+++ b/vector/src/main/java/im/vector/app/core/di/ActiveSessionHolder.kt
@@ -20,6 +20,7 @@ import android.content.Context
 import arrow.core.Option
 import im.vector.app.ActiveSessionDataSource
 import im.vector.app.core.extensions.configureAndStart
+import im.vector.app.core.extensions.startSyncing
 import im.vector.app.core.pushers.UnifiedPushHelper
 import im.vector.app.core.services.GuardServiceStarter
 import im.vector.app.features.call.webrtc.WebRtcCallManager
@@ -100,10 +101,16 @@ class ActiveSessionHolder @Inject constructor(
     }
 
     suspend fun getOrInitializeSession(startSync: Boolean): Session? {
-        return activeSessionReference.get() ?: sessionInitializer.tryInitialize(readCurrentSession = { activeSessionReference.get() }) { session ->
-            setActiveSession(session)
-            session.configureAndStart(applicationContext, startSyncing = startSync)
-        }
+        return activeSessionReference.get()
+                ?.also {
+                    if (startSync && !it.syncService().isSyncThreadAlive()) {
+                        it.startSyncing(applicationContext)
+                    }
+                }
+                ?: sessionInitializer.tryInitialize(readCurrentSession = { activeSessionReference.get() }) { session ->
+                    setActiveSession(session)
+                    session.configureAndStart(applicationContext, startSyncing = startSync)
+                }
     }
 
     fun isWaitingForSessionInitialization() = activeSessionReference.get() == null && authenticationService.hasAuthenticatedSessions()
diff --git a/vector/src/main/java/im/vector/app/core/extensions/Session.kt b/vector/src/main/java/im/vector/app/core/extensions/Session.kt
index caed413e2b6..cb1d46efcef 100644
--- a/vector/src/main/java/im/vector/app/core/extensions/Session.kt
+++ b/vector/src/main/java/im/vector/app/core/extensions/Session.kt
@@ -28,7 +28,7 @@ import org.matrix.android.sdk.api.session.sync.FilterService
 import timber.log.Timber
 
 fun Session.configureAndStart(context: Context, startSyncing: Boolean = true) {
-    Timber.i("Configure and start session for $myUserId")
+    Timber.i("Configure and start session for $myUserId. startSyncing: $startSyncing")
     open()
     filterService().setFilter(FilterService.FilterPreset.ElementFilter)
     if (startSyncing) {
diff --git a/vector/src/main/java/im/vector/app/features/home/room/detail/timeline/helper/TimelineAsyncHelper.kt b/vector/src/main/java/im/vector/app/features/home/room/detail/timeline/helper/TimelineAsyncHelper.kt
index 655d46194df..87c6a1efda1 100644
--- a/vector/src/main/java/im/vector/app/features/home/room/detail/timeline/helper/TimelineAsyncHelper.kt
+++ b/vector/src/main/java/im/vector/app/features/home/room/detail/timeline/helper/TimelineAsyncHelper.kt
@@ -19,7 +19,7 @@ package im.vector.app.features.home.room.detail.timeline.helper
 import android.os.Handler
 import android.os.HandlerThread
 
-private const val THREAD_NAME = "Timeline_Building_Thread"
+private const val THREAD_NAME = "Vector-Timeline_Building_Thread"
 
 object TimelineAsyncHelper {
 
diff --git a/vector/src/main/java/im/vector/app/features/rageshake/BugReporter.kt b/vector/src/main/java/im/vector/app/features/rageshake/BugReporter.kt
index ad09593ebd9..eefbf63a125 100755
--- a/vector/src/main/java/im/vector/app/features/rageshake/BugReporter.kt
+++ b/vector/src/main/java/im/vector/app/features/rageshake/BugReporter.kt
@@ -78,6 +78,7 @@ class BugReporter @Inject constructor(
         private val systemLocaleProvider: SystemLocaleProvider,
         private val matrix: Matrix,
         private val buildMeta: BuildMeta,
+        private val processInfo: ProcessInfo,
         private val sdkIntProvider: BuildVersionSdkIntProvider,
 ) {
     var inMultiWindowMode = false
@@ -499,10 +500,26 @@ class BugReporter @Inject constructor(
      */
     fun openBugReportScreen(activity: FragmentActivity, reportType: ReportType = ReportType.BUG_REPORT) {
         screenshot = takeScreenshot(activity)
-        matrix.debugService().logDbUsageInfo()
+        logDbInfo()
+        logProcessInfo()
+        logOtherInfo()
         activity.startActivity(BugReportActivity.intent(activity, reportType))
     }
 
+    private fun logOtherInfo() {
+        Timber.i("SyncThread state: " + activeSessionHolder.getSafeActiveSession()?.syncService()?.getSyncState())
+    }
+
+    private fun logDbInfo() {
+        val dbInfo = matrix.debugService().getDbUsageInfo()
+        Timber.i(dbInfo)
+    }
+
+    private fun logProcessInfo() {
+        val pInfo = processInfo.getInfo()
+        Timber.i(pInfo)
+    }
+
     private fun rageShakeAppNameForReport(reportType: ReportType): String {
         // As per https://github.com/matrix-org/rageshake
         // app: Identifier for the application (eg 'riot-web').
diff --git a/vector/src/main/java/im/vector/app/features/rageshake/ProcessInfo.kt b/vector/src/main/java/im/vector/app/features/rageshake/ProcessInfo.kt
new file mode 100644
index 00000000000..78e49a2e654
--- /dev/null
+++ b/vector/src/main/java/im/vector/app/features/rageshake/ProcessInfo.kt
@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 2022 New Vector Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package im.vector.app.features.rageshake
+
+import android.annotation.SuppressLint
+import android.app.Application
+import android.os.Build
+import android.os.Process
+import java.lang.reflect.Method
+import javax.inject.Inject
+
+class ProcessInfo @Inject constructor() {
+    fun getInfo() = buildString {
+        append("===========================================\n")
+        append("*              PROCESS INFO               *\n")
+        append("===========================================\n")
+        val processId = Process.myPid()
+        append("ProcessId: $processId\n")
+        append("ProcessName: ${getProcessName()}\n")
+        append(getThreadInfo())
+        append("===========================================\n")
+    }
+
+    @SuppressLint("PrivateApi")
+    private fun getProcessName(): String? {
+        return if (Build.VERSION.SDK_INT >= 28) {
+            Application.getProcessName()
+        } else {
+            try {
+                val activityThread = Class.forName("android.app.ActivityThread")
+                val getProcessName: Method = activityThread.getDeclaredMethod("currentProcessName")
+                getProcessName.invoke(null) as? String
+            } catch (t: Throwable) {
+                null
+            }
+        }
+    }
+
+    private fun getThreadInfo() = buildString {
+        append("Thread activeCount: ${Thread.activeCount()}\n")
+        Thread.getAllStackTraces().keys
+                .sortedBy { it.name }
+                .forEach { thread -> append(thread.getInfo()) }
+    }
+}
+
+private fun Thread.getInfo() = buildString {
+    append("Thread '$name':")
+    append(" id: $id")
+    append(" priority: $priority")
+    append(" group name: ${threadGroup?.name ?: "null"}")
+    append(" state: $state")
+    append(" isAlive: $isAlive")
+    append(" isDaemon: $isDaemon")
+    append(" isInterrupted: $isInterrupted")
+    append("\n")
+}