I am not clear on what exactly is occurring in this case. I saw the screenshot - but is this only momentary (ie: 1 sec or so?). And - is this on a separate monitor?
I have a ‘glitch’ on loading as well, but have never worried about it as it behaves from then on without issue. Factors that appear to matter include:
- whether your display manager is set to load a background, or the same background
- whether the scaling for the secondary screen is the same as the main monitor
- whether the rotation is the same for the secondary monitor.
- whether the background for the secondary monitor is the same as the main one, or a variation
It could probably be tracked down, or modified by working through all the above points… but does it matter if it clears that immediately?
I hope some of this may have SOME relevance to your situation… I have been known to miss the point before!