White line on display while playing game

[Jovana Jovanovic]

I have noticed that sometimes while i am playing Subway Surfers there is white line on display, but it lasts very little, just shows and disappears. Its happening just in that game, when i do something else it doesn't show.. Should i be worried or that is some game's design thing? P.s. I have Lumia 630 DS.

 

[anon(9152079)]

It's probably a game bug.