Go to settings > power saving and select1) limit cpu to 70%2) turn off 5gAnd activate power saving modeThen go to ram plus and select 2gb and restart your phoneThis will reduce the heating issue to some extent , try this solution till samsung fixes t...

For now a display calibration app fixes the issue but please fix it

Facing same issue , sometimes it's oversaturated like too much red and sometimes it's dullIt happens mostly when brightness changes