Useless pixels display screen when enjoying Roblox

Hello I don't know if that is the correct place to publish this however I want recommendation. Everytime I'm enjoying Roblox (Whatever the battery share or how lengthy I've been enjoying) My display screen turns into a bunch of pixels, generally simply turning it on and off removes it However there are occasions when I’ve to restart it for it to go away. It's unusual as a result of it solely occurs with Roblox, there are occasions after I blame it on my telephone getting too sizzling however It's been occurring recently when it's chilly. Ought to I get my telephone checked? Sorry for the poor high quality of the photograph, I took it too shortly lmao