Using a flashlight on killer as they hook someone makes the game crash. My guess is that the game tries to save the survivor but as it's impossible since they are being hooked this happen

flashlight hook -> killer ban <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<&...

I was running a flashlight save build and vault save build I was sneakily sneaking behind the killer stealthy like and as I flashlight saved it kicked me from the game and claimed my Internet went ...