S8 Ultra issue?

[ryanxdampil]

Hello everyone. I have a samsung s8 ultra 5g. The tablet is perfect, but I noticed recently that whenever I play a game a blue line show us for a couple of seconds then goes away quickly. I don't know whether it's an issue with some of you or it's just mine. Software is up to date and my tablet has no cracks or something. Never fell since day one 

[Joeeye]

Does it ever affect any game during use? If not, then I wouldn't worry about it.

[UNKNOWNUSERNAME]

I get that too, my phone also gets it, it's if you scroll down my profile I asked what it was and there was a few answers, have a look.

[icefiresuk]

My S8 Ultra is having touch screen issues only. No blue lines as of yet.