COSMIC dock shows artifacts under Wayland

[devindg]

I recently updated to 21.04 from 20.10. My install is pretty vanilla so I don't think there's anything unique on my end that could be the culprit. Anyway, what I noticed is that the dock has these gray squares in the corners. They aren't there upon logging in, but they show up after the computer comes out of suspend.

I prefer Wayland but know it has its issues. So I logged in under X and tried to replicate my working environment under Wayland (same programs open, etc.). I let the computer go to suspend and woke it up, but no gray squares on the dock.