yes. I did some tests:
[Basing on the config i posted in #3]
- If monitor 1 is marked as "main monitor", the problem occurs on monitor 2. (this is my main configuration)
- If monitor 2 is marked as "main monitor", the problem does NOT appear on any monitor.
- If i swap monitor 2 to the left, the problem does NOT appear on any monitor.
- If i swap monitor 2 to the left AND mark it as "main montior", problem also occurs on monitor 2, which is now on the left.
The pattern seems to be like "if the left monitor is the "main monitor", the problem occurs on monitor 2".
Hope this may help you aswell.
Edit: The Monitors are both the same model and both connected via DP.