7 black dots gets stuck on my screen

So ive only encountered this when im playing normal/flex but thats because the only times I play that is when my internet is bad, so when my ping goes up, sometimes 7 (and always 7) black dots gets stuck somewhere on my screen. It seems to be random cause ive gotten this alot now and its never in the same place.they are always in a row horizontaly but the space and size of the dots have varied a bit. If someone got the same issue or know what the problem is (other than my internet) please let me know. ^^
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