SUMMARY
If you use a drawing tablet (eg. Wacom) and open certain menus/context menus in some KDE applications (eg. Dolphin, System Settings, or an "Open file..." dialog), they will appear in the center of the screen on their own window.

STEPS TO REPRODUCE
1. Open Dolphin (or System Settings)
2. With a drawing tablet, open a context menu (you might need a stylus with buttons) or a hamburger menu by tapping with your stylus

ALTERNATIVE STEPS TO REPRODUCE:
1. Open a brand new Kate or Kolour Paint window (Important: needs to be a new window where you didn't interact with the "Open with..." dialog with your regular mouse, otherwise it won't work. Only use your stylus)
2. Select "Open with", "Open...", etc with your stylus
3. Again, with your stylus, click on the arrow on the Filter field at the bottom to list all formats

OBSERVED RESULT
The hamburger menu/context menu/list will appear in its own separate window at the center of the screen. The terminal doesn't show anything out of the ordinary when that happens.

EXPECTED RESULT
Menus should open normally

Operating System: KDE neon Unstable Edition
KDE Plasma Version: 5.27.80
KDE Frameworks Version: 5.103.0
Qt Version: 5.15.8
Kernel Version: 5.15.0-58-generic (64-bit)
Graphics Platform: Wayland
Processors: 6 × Intel® Core™ i5-9400F CPU @ 2.90GHz
Memory: 15,6 GiB of RAM
Graphics Processor: AMD Radeon RX 570 Series