I see this quite regularly, but normally it’s only fleeting and if I try and e.g. go back to see it it’s no longer there. This time though I noticed it while stopped and immediately took a screenshot.
The glitch is a vertical dark line on the minimap, one pixel wide, like a seam in the map. It always looks like that, from top to bottom of the minimap, though not centred or always in the same position.
It’s not due to rotation, like the other bug – I have minimap rotation off. It just seems to happen at odd times almost anywhere.