https://bugs.kde.org/show_bug.cgi?id=465595

            Bug ID: 465595
           Summary: 5.27: task manager hover is sluggish
    Classification: Plasma
           Product: plasmashell
           Version: 5.26.90
          Platform: Gentoo Packages
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: Task Manager and Icons-Only Task Manager
          Assignee: [email protected]
          Reporter: [email protected]
  Target Milestone: 1.0

Created attachment 156157
  --> https://bugs.kde.org/attachment.cgi?id=156157&action=edit
Demo using floating panel at bottom of screen

SUMMARY
Since the last couple days, the 5.27 branch of icons-only task manager exhibits
the problem, that hovering items is more sluggish compared to before. I've
recorded a video to showcase what I mean: When I hover over an item, it takes
about a second until it gets highlighted - this was not the case before.

When I move the mouse to the very bottom of the screen, the feedback is instant
(the flickering of the icons is only present in the Wayland session - but the
delay bug exists on both X11 and Wayland).


STEPS TO REPRODUCE
1. Create a panel (floating or regular doesn't matter)
2. Add "Icons-Only Task Manager"
3. Hover over entries

OBSERVED RESULT
It takes ~1 second for the entry to be highlighted

EXPECTED RESULT
Entry is highlighted instantly

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Gentoo
(available in About System)
KDE Plasma Version: 5.27 beta
KDE Frameworks Version: 5.102.0
Qt Version: 5.15.8
Mesa: 22.3.5

ADDITIONAL INFORMATION
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