SUMMARY
When viewing a folder with HTML files in Dolphin, a popup window with the name "kioworker" shows as it generates for each file. For folders with a large number of files, this makes the window unusable as it constantly loses focus.

STEPS TO REPRODUCE
1. Open a Dolphin window
2. Navigate to a folder with many HTML files

OBSERVED RESULT
A visible popup window with no controls, showing with the name "kioworker" on the panel, is shown as the preview is generated for each file. Each one is open for 0.5-1 s before closing and opening again for the next preview, with the popup stealing focus each time it opens.

EXPECTED RESULT
Previews are generated in the background without interrupting the ability to interact with the window showing the folder or any other window with focus.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Arch Linux
KDE Plasma Version:  6.3.2
KDE Frameworks Version: 6.11.0
Qt Version: 6.8.2

ADDITIONAL INFORMATION
I am running with a Wayland session.