Trouble with firebase and subclass of UnityAppController iOS

Hi guys. I have a trouble with firebase sdk for Unity. It works fine. But If I will add my custom subclass of UnityAppController I will have runtime issue. Actually method didFinishLaunchingWithOptions will never be called. The result is Unity will never initialized. How I can fix it?

For anyone may have this problem,
new version of Google Firebase SDK(v3.0.0) resolved this issue.

https://firebase.google.com/support/release-notes/unity#3.0.0