diff --git a/SignalServiceKit/src/Messages/OWSIdentityManager.m b/SignalServiceKit/src/Messages/OWSIdentityManager.m
index d9083a651..0c7f3f1c7 100644
--- a/SignalServiceKit/src/Messages/OWSIdentityManager.m
+++ b/SignalServiceKit/src/Messages/OWSIdentityManager.m
@@ -100,9 +100,6 @@ NSString *const kNSNotificationName_IdentityStateDidChange = @"kNSNotificationNa
     _storageManager = storageManager;
     _dbConnection = storageManager.newDatabaseConnection;
     self.dbConnection.objectCacheEnabled = NO;
-#if DEBUG
-    self.dbConnection.permittedTransactions = YDB_AnySyncTransaction;
-#endif
     _messageSender = messageSender;
 
     OWSSingletonAssert();
diff --git a/SignalServiceKit/src/Storage/AxolotlStore/TSStorageManager+SessionStore.m b/SignalServiceKit/src/Storage/AxolotlStore/TSStorageManager+SessionStore.m
index f40711c6c..d52890ae5 100644
--- a/SignalServiceKit/src/Storage/AxolotlStore/TSStorageManager+SessionStore.m
+++ b/SignalServiceKit/src/Storage/AxolotlStore/TSStorageManager+SessionStore.m
@@ -49,6 +49,8 @@ NSString *const kSessionStoreDBConnectionKey = @"kSessionStoreDBConnectionKey";
     OWSAssert([protocolContext isKindOfClass:[YapDatabaseReadWriteTransaction class]]);
 
     YapDatabaseReadWriteTransaction *transaction = protocolContext;
+    // For consistency, we should only access session state on non-caching connections.
+    OWSAssert(!transaction.connection.objectCacheEnabled);
 
     NSDictionary *_Nullable dictionary =
         [transaction objectForKey:contactIdentifier inCollection:TSStorageManagerSessionStoreCollection];
@@ -76,6 +78,8 @@ NSString *const kSessionStoreDBConnectionKey = @"kSessionStoreDBConnectionKey";
     OWSFail(@"%@ subDevicesSessions is deprecated", self.logTag);
 
     YapDatabaseReadWriteTransaction *transaction = protocolContext;
+    // For consistency, we should only access session state on non-caching connections.
+    OWSAssert(!transaction.connection.objectCacheEnabled);
 
     NSDictionary *_Nullable dictionary =
         [transaction objectForKey:contactIdentifier inCollection:TSStorageManagerSessionStoreCollection];
@@ -93,6 +97,8 @@ NSString *const kSessionStoreDBConnectionKey = @"kSessionStoreDBConnectionKey";
     OWSAssert([protocolContext isKindOfClass:[YapDatabaseReadWriteTransaction class]]);
 
     YapDatabaseReadWriteTransaction *transaction = protocolContext;
+    // For consistency, we should only access session state on non-caching connections.
+    OWSAssert(!transaction.connection.objectCacheEnabled);
 
     // We need to ensure subsequent usage of this SessionRecord does not consider this session as "fresh". Normally this
     // is achieved by marking things as "not fresh" at the point of deserialization - when we fetch a SessionRecord from
@@ -136,6 +142,8 @@ NSString *const kSessionStoreDBConnectionKey = @"kSessionStoreDBConnectionKey";
     OWSAssert([protocolContext isKindOfClass:[YapDatabaseReadWriteTransaction class]]);
 
     YapDatabaseReadWriteTransaction *transaction = protocolContext;
+    // For consistency, we should only access session state on non-caching connections.
+    OWSAssert(!transaction.connection.objectCacheEnabled);
 
     DDLogInfo(
         @"[TSStorageManager (SessionStore)] deleting session for contact: %@ device: %d", contactIdentifier, deviceId);
@@ -159,6 +167,8 @@ NSString *const kSessionStoreDBConnectionKey = @"kSessionStoreDBConnectionKey";
     OWSAssert([protocolContext isKindOfClass:[YapDatabaseReadWriteTransaction class]]);
 
     YapDatabaseReadWriteTransaction *transaction = protocolContext;
+    // For consistency, we should only access session state on non-caching connections.
+    OWSAssert(!transaction.connection.objectCacheEnabled);
 
     DDLogInfo(@"[TSStorageManager (SessionStore)] deleting all sessions for contact:%@", contactIdentifier);
 
@@ -171,6 +181,8 @@ NSString *const kSessionStoreDBConnectionKey = @"kSessionStoreDBConnectionKey";
     OWSAssert([protocolContext isKindOfClass:[YapDatabaseReadWriteTransaction class]]);
 
     YapDatabaseReadWriteTransaction *transaction = protocolContext;
+    // For consistency, we should only access session state on non-caching connections.
+    OWSAssert(!transaction.connection.objectCacheEnabled);
 
     DDLogInfo(@"[TSStorageManager (SessionStore)] archiving all sessions for contact: %@", contactIdentifier);
 
diff --git a/SignalServiceKit/src/Util/OWSBackgroundTask.m b/SignalServiceKit/src/Util/OWSBackgroundTask.m
index bee9fc046..fbf45dca2 100644
--- a/SignalServiceKit/src/Util/OWSBackgroundTask.m
+++ b/SignalServiceKit/src/Util/OWSBackgroundTask.m
@@ -80,33 +80,32 @@
     DispatchMainThreadSafe(^{
         __weak typeof(self) weakSelf = self;
         self.backgroundTaskId = [CurrentAppContext() beginBackgroundTaskWithExpirationHandler:^{
-            // Note the usage of OWSCAssert() to avoid capturing a reference to self.
-            OWSCAssert([NSThread isMainThread]);
+            dispatch_async(dispatch_get_main_queue(), ^{
+                OWSBackgroundTask *strongSelf = weakSelf;
+                if (!strongSelf) {
+                    return;
+                }
 
-            OWSBackgroundTask *strongSelf = weakSelf;
-            if (!strongSelf) {
-                return;
-            }
+                // Make a local copy of completionBlock to ensure that it is called
+                // exactly once.
+                BackgroundTaskCompletionBlock _Nullable completionBlock = nil;
 
-            // Make a local copy of completionBlock to ensure that it is called
-            // exactly once.
-            BackgroundTaskCompletionBlock _Nullable completionBlock = nil;
+                @synchronized(strongSelf)
+                {
+                    if (strongSelf.backgroundTaskId == UIBackgroundTaskInvalid) {
+                        return;
+                    }
+                    DDLogInfo(@"%@ %@ background task expired.", strongSelf.logTag, strongSelf.label);
+                    strongSelf.backgroundTaskId = UIBackgroundTaskInvalid;
 
-            @synchronized(strongSelf)
-            {
-                if (strongSelf.backgroundTaskId == UIBackgroundTaskInvalid) {
-                    return;
+                    completionBlock = strongSelf.completionBlock;
+                    strongSelf.completionBlock = nil;
                 }
-                DDLogInfo(@"%@ %@ background task expired.", strongSelf.logTag, strongSelf.label);
-                strongSelf.backgroundTaskId = UIBackgroundTaskInvalid;
-
-                completionBlock = strongSelf.completionBlock;
-                strongSelf.completionBlock = nil;
-            }
 
-            if (completionBlock) {
-                completionBlock(BackgroundTaskState_Expired);
-            }
+                if (completionBlock) {
+                    completionBlock(BackgroundTaskState_Expired);
+                }
+            });
         }];
 
         // If a background task could not be begun, call the completion block.