I can't re-produce but yeah, it would be a hardware acceleration problem in chromium.
This weeks sync contained updates to both browsers.
- Brave updated their chromium base from 84.0.4147.125 to 85.0.4183.83
- opera-stable updated their chromium base from 84.0.4147.135 to 85.0.4183.102
So if this is a recent occurrence, there must be a issue with the 85 series and your hardware.