This is clearly a GPU rendering bug.
A workaround for this is to disable GPU rendering at all. To investigate this further, the team would need full details on the OS and GPU used, along with a test file.
Please provide these in the comments in the original bug report or send them over to email@example.com
Does this only appear at very high magnification levels?
Does it appear in raster images (jpgs, pngs) when exported?
Does it appear in saved PDFs?
It looks like a GPU rendering error. You could also try turning off the GPU settings in the preferences to see if that clears it up.