i've also been struggling with the frozen screen.
After a few days, went to check the fuse22 and it was blown. Replaced it and it blew immediately...
Then replaced it with a 30A fuse and it didn't blew up.
After that, i was able, using the bypass mode of the BT module, to recover all the functionalities of the screen without the BT capabilities.
The BT module, as far as i know, packed up... In truth, it smells a bit of burned electrics.
As far as I know, i have no water ingress anywhere. Everything seems dry.