SUMMARY If you use two monitors and have a panel with the Global Menu widget on each monitor, it glitches out to where it will only follow one monitor. For example, if I have Monitor 1 (Primary) and Monitor 2, if I open Dolphin, there will be no Global Menu on Monitor 1. If I move it to Monitor 2, the Global Menu activates on BOTH Monitor 1's panel and Monitor 2's panel. If I move Dolphin back to Monitor 1, the Global Menu (on both monitors) disappears. If I delete the Global Menu widget and re-add it, it will temporarily work as expected (where the Global Menu activates when the app is on that monitor). Actually now that I'm typing this I tried removing the second Global Menu and the first one is still only following monitor 2. It's hard to explain, so here's a video: https://youtu.be/LveDjmk34KY STEPS TO REPRODUCE 1. Have two monitors with a panel on each monitor 2. Add global menu to the main monitor's panel (or both panels) 3. For a short time it will work as intended, but it always reverts to this behavior at some point (always after a reboot too from what I can tell) OBSERVED RESULT Global Menu follows the wrong display EXPECTED RESULT Global Menu follows the correct display SOFTWARE/OS VERSIONS Linux/KDE Plasma: Arch Linux, kernel 5.14.7 (available in About System) KDE Plasma Version: 5.22.5 KDE Frameworks Version: 5.87.0 Qt Version: 5.15.2 *Note: Under the Version drop down on this bug report page, 5.22.5 isn't available. I'm on 5.22.5.
I guess this bug consists of two parts: 1. Global Menu applet only follows tasks on a screen that its on (not a bug but a feature, see BUG 420418 for more). 2. Global Menu does not always reset properly after switching to another virtual desktop / monitor / activity etc. Hopefully, this part is going to be fixed by https://invent.kde.org/plasma/plasma-workspace/-/merge_requests/2157