xxx Can you provide more information about when the crashes are happening?
You say "the whole time." Does that mean the app was crashing constantly, only while you were using it, or when you were doing specific things?
If it isn't constant, what could you do to reliably make it crash?
Did you get logs so the developers can see what was causing the crashes? You can send them to logs@grapheneos.org and send a link to this discussion.
xxx Only solution was to switch back to version 5.
How did you do this?