Created attachment 156184 [details]
Delay while hovering

SUMMARY
On Neon Unstable with updates as of Feb. 11th, there's a noticeable delay in activating the hover state for programs on the task manager. This happens on both X11 and Wayland and happens on Icon-only mode and task manager mode. Highlights on other widgets are normal. Also, there's no jump in CPU usage or any message on the terminal that could explain what is happening. This is not present in Plasma 5.26.5 (tested on another, slower computer).

STEPS TO REPRODUCE
1. Move the mouse cursor over various icons (check the attached video)

OBSERVED RESULT
Up to one second of delay to transition from the normal to the highlighted state.

EXPECTED RESULT
Highlights should apply instantly

SOFTWARE/OS VERSIONS
Operating System: KDE neon Unstable Edition
KDE Plasma Version: 5.27.80
KDE Frameworks Version: 5.104.0
Qt Version: 5.15.8
Kernel Version: 5.15.0-60-generic (64-bit)
Graphics Platform: Wayland
Processors: 6 × Intel® Core™ i5-9400F CPU @ 2.90GHz
Memory: 15,6 GiB of RAM
Graphics Processor: AMD Radeon RX 570 Series