diff --git a/CRM/Admin/Form/Setting.php b/CRM/Admin/Form/Setting.php
index e19ff5128651..695f6f097df4 100644
--- a/CRM/Admin/Form/Setting.php
+++ b/CRM/Admin/Form/Setting.php
@@ -233,6 +233,7 @@ public function commonProcess(&$params) {
     }
 
     CRM_Core_Config::clearDBCache();
+    Civi::cache('session')->clear(); // This doesn't make a lot of sense to me, but it maintains pre-existing behavior.
     CRM_Utils_System::flushCache();
     CRM_Core_Resources::singleton()->resetCacheCode();
 
diff --git a/CRM/Admin/Form/Setting/UpdateConfigBackend.php b/CRM/Admin/Form/Setting/UpdateConfigBackend.php
index 68711ff42aa6..b5c7bb8c57b8 100644
--- a/CRM/Admin/Form/Setting/UpdateConfigBackend.php
+++ b/CRM/Admin/Form/Setting/UpdateConfigBackend.php
@@ -65,6 +65,7 @@ public function postProcess() {
 
       // clear all caches
       CRM_Core_Config::clearDBCache();
+      Civi::cache('session')->clear();
       CRM_Utils_System::flushCache();
 
       parent::rebuildMenu();
diff --git a/CRM/Core/BAO/ConfigSetting.php b/CRM/Core/BAO/ConfigSetting.php
index 8cc765328614..bb5340bbec4a 100644
--- a/CRM/Core/BAO/ConfigSetting.php
+++ b/CRM/Core/BAO/ConfigSetting.php
@@ -260,6 +260,7 @@ public static function doSiteMove($defaultValues = array()) {
 
     // clear all caches
     CRM_Core_Config::clearDBCache();
+    Civi::cache('session')->clear();
     $moveStatus .= ts('Database cache tables cleared.') . '<br />';
 
     $resetSessionTable = CRM_Utils_Request::retrieve('resetSessionTable',
diff --git a/CRM/Core/Config.php b/CRM/Core/Config.php
index 14baccd3510b..265532c67d8b 100644
--- a/CRM/Core/Config.php
+++ b/CRM/Core/Config.php
@@ -295,6 +295,7 @@ public function cleanupCaches($sessionReset = TRUE) {
 
     // clear all caches
     self::clearDBCache();
+    Civi::cache('session')->clear();
     CRM_Utils_System::flushCache();
 
     if ($sessionReset) {