I have a s22 ultra, and for the most part it has been great. However lately it has been turning itself off, so far it's happened 3 times over the last month.  Then today I was watching YouTube the screen went black then almost immediately it entered download mode. 3 or 4 barcodes popped up then the blue download screen with other languages was displayed. It seems like it is doing more and more stuff on its own and am wondering if this is normal? Or how I can take back control lol.