After adding functionality to Listen to Firestore database updates, my Unity-Firebase app crashes whenever the AssetDatabase Refreshes. Looking in the error log I see
0x00007FFD2F8F6D06 (FirebaseCppApp-6_16_1) SWIGRegisterStringCallback_StorageInternal
And some other Firebase access errors. This only happens after adding ListenerRegistration to firestore documents, even though the listener registration is being .Dispose()d.
I'm posting this to SO because it took me many days to solve this problem and found no helpful information addressing one fundamental problem source: The Unity Getting Started Docs never inform you to use FirebaseApp.Dispose()
My solution was simple, though discovering it was not:
// During initialization:
firebaseApp = FirebaseApp.DefaultInstance;
// Clean up when quitting app
private void OnApplicationQuit() {
listenerRegistration.Dispose(); // Any event listener must be disposed
firebaseApp.Dispose(); // the base firebase app must be disposed
}