s21 Ultra lag issues

[usergfpsAtKvFs]

I like first person shooters. Left To Survive is very good. I've been playing it for over 1 year.  I'm having some lag issues with my new s21 ultra tho. The game ran with no issues on my s9+.  If I restart the phone it goes away implying it's a RAM issue. I downloaded a cleaning analyzer and only at 50 to 60% . 

If anyone has similar issues and have solved the ultra issues let me know. I'm about ready to return it to at&t and swap for an apple i12.

Thanks, 

[usergfpsAtKvFs · Accepted solution]

I discovered the game is incompatible with the Samsung game launcher. I started the game from it's app icon and most of the lag went away.