From the update to Plasma 6.7.5 (from Plasma 6.7.4) and KDE Frameworks 6.30.0 (from KDE Frameworks 6.29.0).
Operating System: openSUSE Tumbleweed 20260911
KDE Plasma Version: 6.7.5
KDE Frameworks Version: 6.30.0
Qt Version: 6.11.2
Kernel Version: 7.2.4-1-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
I don’t have preview windows in taskbar.
The settings are not changed.
With Plasma 6.7.4 and KDE Frameworks 6.29.0 all goes well.
Regards


