Yeah, heard this news. Even this green line issues started in March itself with Feb Security Patch. Staying in Air conditioned room most of the time helps. But people who are always in the move, especially in this summer, may need to wait before applying one.
Actually wrt heating issues, my S21 FE (SD 888) is much much better than my wife's S22+ (SD 8G1). But at least, Samsung allowed FREE screen replacement for S22 & even S21 series (not sure its still available though), but NEVER so for S21 FE.
So S21 FE users, be careful before applying any software update.