[REQUIRED] Step 1: Describe your environment

• Xcode version: 13.1
• Firebase SDK version: 8.9
• Installation method: Swift Package Manager
• Firebase Component: not sure (Auth, Core, Database, Firestore, Messaging, Storage, etc)

[REQUIRED] Step 2: Describe the problem

Steps to reproduce:

Launch ARKit while using: Auth, Firestore Listeners

Relevant Code:

Unfortunately, I am not sure where the bug gets triggered. It seems to originate in some App Check code.

What I am doing is launch a view controller for an ARKit Session. If i go back to 8.8 it works without issues.

Also what I have noticed is that tokenDidChangeNotificationName's notification observer gets called very often before the crash happens. I'd say a few dozen times per second.

`