I have a Galaxy Z Fold 3 from AT&T running Android 13. When I start to play a video on the small screen and unfold the phone it continues onto the big screen, but when I refold it it just goes back to the lock screen. It used to continue successfully when I refolded it so I'm assuming that it lost that functionality due to either an Android or Samsung update. I've played around with the lock screen settings but no help.