Icons-only taskbar doesn't show small previews no matter if the setting is toggled?

Hello, I recently installed KDE for my Arch installation and realized that the taskbar doesn’t seem to be showing the small previews for tasks when hovering over them. It works fine on my Ubuntu installation and it seems to just ignore the setting when I turn it on and off again, so I’m not sure what’s going on…

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In openSUSE TW I don’t have this issue. I think that is the distribution if you say that in Ubuntu works but none in Arch.
Videocaptura de pantalla_20260417_120404

You can try to make a new user and see if happens too.
If yes, is the distribution. If not, is the user.

Operating System: openSUSE Tumbleweed 20260411
KDE Plasma Version: 6.6.4
KDE Frameworks Version: 6.25.0
Qt Version: 6.11.0
Kernel Version: 6.19.11-1-default (64-bit)
Graphics Platform: Wayland
Processors: 14 × Intel® Core™ Ultra 5 245K
Memory: 32 GiB of RAM (30.9 GiB usable)
Graphics Processor: NVIDIA GeForce RTX 5070

Regards

Run

QT_LOGGING_RULES="qml.debug=true" plasmawindowed org.kde.plasma.icontasks

Hover on an icon to see if that produces any errors in the terminal if yes then send the errors here

This is what I get when running that:

kf.package: Could not find required file "mainscript" for package "/usr/share/plasma/plasmoids/org.kde.plasma.icontasks/" should be QList("ui/main.qml")
org.kde.plasma.taskmanager: Failed to register unity service
org.kde.plasma.notificationmanager: Failed to register JobViewServer service on DBus, is kuiserver running?
qml: 14
qml: undefined

I can’t get anything else to appear through hovering over the taskbar or opening anything

"/usr/share/plasma/plasmoids/org.kde.plasma.icontasks/" should be QList("ui/main.qml")
This is the relevant part but this error should be harmless. Try to update plasma-desktop

Updated it and still nothing

Bruh, are you on wayland? Does switching to x11 solve the issue?