This happens often when playing.
I start with clear resolution and as long as I am being killed it seems there is no issue.
However when I get killing well especially a Rail-gunner, I get a lot of colorful garbage going across the screen.
It moves all over and is quite distracting.
Sometimes it will go away again but overall it is a real pain.
I have uninstalled and reinstalled. I have 75/75 Mbps fiber internet so no connectivity issues.
Customer support service by UserEcho