S 21 ultra overheats dramatically in Google Duo

[LLI]

The phone has been great so far but only 3 4 minutes in a Google Duo call it starts burning my hand. Upper fron and back of the phone are getting very hot when upper left part at the frame literally can not be touched. It os getting that hot. 

Is anyone else having this issue?

[LLI]

I can't deal with this anymore... I am just returning the phone. I had similar experience with s20+ last year. New processor is much better but I just don't want to use the phone with oven mittens...