When the canvas is horizontally flipped (H) there are some black artefacts relating to the brush on the screen, have also noticed some others too not necessarily relating to the brush on the screen.

Running on:
Windows 11 (although pretty sure this also happens on Windows 10)
Glaxy Book Flex

See the video demonstration below:

https://www.youtube.com/watch?v=vfBdhK6J5xI