diff --git a/iOS_SDK/OneSignalSDK/OneSignalInAppMessages/Controller/OSMessagingController.m b/iOS_SDK/OneSignalSDK/OneSignalInAppMessages/Controller/OSMessagingController.m
index 17fba3d46..47bc312ff 100644
--- a/iOS_SDK/OneSignalSDK/OneSignalInAppMessages/Controller/OSMessagingController.m
+++ b/iOS_SDK/OneSignalSDK/OneSignalInAppMessages/Controller/OSMessagingController.m
@@ -901,7 +901,9 @@ - (void)messageViewDidDisplayPage:(OSInAppMessageInternal *)message withPageId:(
 
 - (void)messageIsNotActive:(OSInAppMessageInternal *)message {
     [self deleteInactiveMessage:message];
-    [self cleanUpInAppWindow];
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self cleanUpInAppWindow];
+    });
 }
 
 - (void)messageWillDisplay:(nonnull OSInAppMessageInternal *)message {