Qubes OS works fine in single-monitor mode. However, after connecting a second monitor (3440×1440), notifications from AppVMs often get stuck on the screen and continuously blink instead of disappearing. This happens most of the time and is quite distracting.
In addition, some windows occasionally remain stuck on the screen (as if they were not being repainted) for several seconds. Does anyone have any suggestions on what I should investigate or which logs I should check?