so got mine back and the backup camera is no longer full screen. did this happen to anyone?

check your options

exactly right, thanks. that setting is not easy to find, though. took mine to get software update because i hade a 'dynamic drive' failure. got it back yest, hit a pothole today, got the same error. last time i got it, i used bmw assist and bmw told me i likely needed a software update. so today after the failure, i shut off the engine, started it up again and the error was gone.