Google Maps, the native Android phone app, behaves like a crappy website in navigation mode.
Google really wants to push the assistant, there isn't a way to completely disable it in Android, disable all shortcuts, basically make it go away.
So, in Google Maps, there's a Assistant bar at the bottom. That only pops up when you're in navigation mode, and "conveniently", slides up when you switch apps.
So if you're in another app and decide to exit navigation using the X at the bottom left of Google Maps... the Assistant button slides up and you accidentally press it.