The "fix" for me was to uninstall android studio and downgrade from the latest version, all the way back to Dolphin. Firebase doesn't quite work how it should but the app seems to be working. These are the versions of things I'm using now in case it helps anyone else having the same problem as me. gradle plugin 7.2.2 gradle distribution 7.5 kotlin 1.8.0 java 17 dart 2.17.1 flutter 3.0.1