changelog and fix test hang

CHANGELOG.md

@@ -8,6 +8,7 @@
 * In RQL 'NONE x BETWEEN ...' and 'ANY x BETWEEN ...' had incorrect behavior, so it is now disallowed ([#5508](https://github.com/realm/realm-core/issues/5508), since v11.3.0)
 * `SyncManager::path_for_realm` now allows custom file names for Flexible Sync enabled Realms. (Issue [#5473](https://github.com/realm/realm-core/issues/5473)).
 * Fix ignoring ordering for queries passed into sync subscriptions in the C API. (Issue [#5504](https://github.com/realm/realm-core/issues/5504)).
+* FLX sync will now ensure that a bootstrap from the server will only be applied if the entire bootstrap is received - ensuring there are no orphaned objects as a result of changing the read snapshot on the server ([#5331](https://github.com/realm/realm-core/pull/5331))
 
 ### Breaking changes
 * None.

test/object-store/sync/flx_sync.cpp

@@ -22,6 +22,7 @@
 
 #include "flx_sync_harness.hpp"
 #include "realm/object-store/impl/object_accessor_impl.hpp"
+#include "realm/object-store/impl/realm_coordinator.hpp"
 #include "realm/object-store/schema.hpp"
 #include "realm/object-store/sync/generic_network_transport.hpp"
 #include "realm/object-store/sync/sync_session.hpp"
@@ -358,8 +359,12 @@ TEST_CASE("flx: interrupted bootstrap restarts/recovers on reconnect", "[sync][f
         }
 
         interrupted.get();
+        realm->sync_session()->shutdown_and_wait();
+        realm->close();
     }
 
+    _impl::RealmCoordinator::clear_all_caches();
+
     {
         auto realm = DB::create(sync::make_client_replication(), interrupted_realm_config.path);
         auto sub_store = sync::SubscriptionStore::create(realm, [](int64_t) {});