Bug 475802

Created attachment 162407 [details]
Screenshot showing how the checkbox for "All activities" is checked on a newly launched instance of Firefox

SUMMARY
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STEPS TO REPRODUCE
1. Set up two or more activities
2. Reboot
3. Open any app

OBSERVED RESULT
The opened app shows on all activities, without any way to make it show on only one (or fewer than `n`, where `n` is number of configured activities).

EXPECTED RESULT
The app only opens on the currently active activity, and it's possible to move the app between different activities.

SOFTWARE/OS VERSIONS
Operating System: Arch Linux 
KDE Plasma Version: 5.27.8
KDE Frameworks Version: 5.110.0
Qt Version: 5.15.11
Kernel Version: 6.5.7-zen2-1-zen (64-bit)
Graphics Platform: Wayland
Processors: 24 × AMD Ryzen 9 5900X 12-Core Processor
Memory: 62,7 GiB of RAM
Graphics Processor: AMD Radeon RX 6900 XT
Manufacturer: Micro-Star International Co., Ltd.
Product Name: MS-7C84
System Version: 1.0

ADDITIONAL INFORMATION
Neither checking the checkbox for a different activity, nor the "move to activity" buttons work to stop an app from showing in all activities.

This issue only seems to occur after a new boot after setting up activities. If I delete *all* activities and set them up again, things work normally until the next boot.

If I create a new activity after booting, I can move apps to the new activity as normal, and it will remove it from the existing activities, but it's not possible to then move the app back to the existing activities, only to new activities created after boot.