Some weird gray boxes appear while in BIOS

[probablydumb]

Alright so to keep this short when i enter my bios and click around on different tabs small gray boxes appear behind my cursor and stay there until i go over them with my cursor i just want to know if anyone also has this or why this happens? It's not like 100000 gray boxes on my screen, only about 2 appear and they go away as soon as i go with my cursor on them they only appear if i started going with my mouse over the tabs.i have a Asus TUF B450M PLUS GAMING Mobo

[Guest]

The render is on the Cpu. Sometimes this just occurs basically because it's slow computing. If the cpu is in a low P-state, it may produce these boxes. I've seen this on my board from time to time. Haven't had any issues from it, a clear cmos seems to help.