B2: GPS/GNSS not working anymore

I'd have hoped you'd have seen messages like t: "gps_power", status: true}

Yes i saw that in the log.

The frustrating thing is that when disconnected, it should work as normal - but the second you connect to see what's going on it would switch to the Gadgetbridge mode.

That would explain why it worked sometimes but most of the times not.

There is a PR for some changes to this

I have seen that. Take your time :)