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SUMMARY
When mousing over items in a folder view widget, they are not consistently highlighted and clickable, as though they are losing focus.

STEPS TO REPRODUCE
1. Add "folder view" widget to panel, pointing to somewhere with a few files/folders.
2. Configure "Icons/View Mode" as "List" (the default).
3. Move cursor up and down list of files/folders.

OBSERVED RESULT
Sometimes the cursor is on top of items and they are not highlighted; clicking has no effect.

EXPECTED RESULT
The item that the cursor is hovering over should be highlighted and clickable at all times.

SOFTWARE/OS VERSIONS
Arch Linux (confirmed in a fresh VM)
KDE Plasma: 6.0.3
(available in About System)
KDE Plasma Version: 6.0.3
KDE Frameworks Version: 6.0.0
Qt Version: 6.6.3
Using Wayland KWin session.

ADDITIONAL INFORMATION
Seems to have some link to changing the direction of the cursor up/down. It also happens in Icon view but is hard to notice as it seems the larger size of the icons causes the highlighting to kick in after some amount of movement.

I believe this regression occurred between 5.27 and 6.0; unfortunately I am currently short on time to investigate exactly where further.