Bug 508094

SUMMARY

Apparently a focus bug causes cursor right to sometimes apply to the plasma task list widget rather than the focused window. In practice, this means when I use cursor keys to navigate text in applications, sometimes suddenly cursor right will bring up a completely different window (despite it also being processed as cursor right by the previous window as intended). If I click onto a window a couple of times the focus will sometimes stick again, and cursor right will no longer be also processed by the task bar. I'm not entirely sure this is what happens but I think it is. On my older plasma 6.3 machine this doesn't happen, or I haven't ever seen it.

STEPS TO REPRODUCE

1. Use cursor keys to navigate text a lot, including cursor right key. This happens with all applications, I tried among others xfce4 terminal, Thunderbird, some electron apps, at least one SDL2 app, and so on. So I don't think the apps or their toolkits are at fault. This seems to be happening at the kwin or plasma level.

OBSERVED RESULT

Cursor right will sometimes switch to a completely different window like alt tab. From how the task bar icons look slightly hovered or focused, I'm thinking it's somehow the plasma icons only task widget grabbing the cursor key input somehow, which I assume must be forwarded to it (incorrectly) by kwin on some level.

EXPECTED RESULT

Cursor right only goes to the focused window.

SOFTWARE/OS VERSIONS

Windows: 
macOS: 
(available in the Info Center app, or by running `kinfo` in a terminal window)
Linux/KDE Plasma: postmarketOS Edge based on Alpine Edge
KDE Plasma Version: 6.4.2 (notably the bug doesn't appear with 6.3.x)
KDE Frameworks Version: 6.16.0
Qt Version: 6.9.1

ADDITIONAL INFORMATION