Bug 494982

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SUMMARY
I opened a pdf via Obsidian, with the "Open in defaut app" option. Okular opened and I added some sticky notes, saving the process while Obsidian was open. Then I move the Okular window into another virtual desktop. Lately I closed Obsidian. I think that I forgot that I moved the Okular window to other virtual desktop, and I turned off the computer.
When I turned it on again, the Okular window was in the second virtual desktop.
I rebooted, closing the window before, and continue happeing.

STEPS TO REPRODUCE
1. Open a pdf via Obsidian.
2. Move the window to other virtual desktop (KDE Plasma).
3. Shutdown the PC.
4. Turn it on again.
5. Close the window.
6. Repeat 3 and 4.

OBSERVED RESULT
The Okular window keeps open.

EXPECTED RESULT
The Okular window shoud be closed.

SOFTWARE/OS VERSIONS
Operating System: Arch Linux 
KDE Plasma Version: 6.2.1
KDE Frameworks Version: 6.7.0
Qt Version: 6.8.0
Kernel Version: 6.11.3-arch1-1 (64-bit)
Graphics Platform: X11
Processors: 8 × Intel® Core™ i5-10300H CPU @ 2.50GHz
Memory: 15.5 GiB of RAM
Graphics Processor: Mesa Intel® UHD Graphics

ADDITIONAL INFORMATION
Obsidian version: 1.7.4