Just bought my Tab S7 and noticed display issue stright away after I switched it on.Brown (shades) tint on top corners of tablet when working on white background.Got in contact with Samsung and asked for replacement.After a week I got a new tablet and guess what ???.....New one was having same issues like first one.Sent it back to Samsung and now I'm waiting for the third one.Hope is gonna be ok this time.
I've had my S7 Plus a few weeks now and haven't experienced any problems so far! After reading your post, I have to admit I checked, then re-checked my Tab. Thankfully no brown shades on it whatsoever. I would be interested to find out what has caused your fault though. Hope you get yours sorted out soon!!!! 🤞