USB-OTG Hard Crashes Phone

Connecting the phone to a computer, such as an Android phone, to copy to copy files from it or similar, the screen will go black and the phone will become unresponsive. Only holding power reboots it.

Bluetooth is working, but cannot reliably connect to or read nearby devices.

Can not connect to a PC, Speaker, Headphones, ... anything. It sometimes conects but nothing works. Many devices show up as unkown even though they are having readable names on other devices.

NFC works but no APP / Setting I found can read anything

The Apps see there is something but can not realy read it / write to it.