Odd issues like this are to be expected, best thing to do is report it. However beta 3 is now available and I have not experienced any thermal issues on any of the beta releases.
My phone overheating very quick , still using the simple task like Instagram Facebook. Browsing,also when watching YouTube have throttle , sound delay . So many problems .
I have the same problem. I've got an iPhone 13 pro max which is not over heating. I believe screen is turning on when in pocket as often I take the phone out and it mentions that finger print sensor turned off due to too many incorrect touches.