"focus follows mouse" does not work during wayland display. It is unreliable, the window under the cursor does not always get the focus. SOFTWARE/OS VERSIONS KDE neon Testing Edition Linux/KDE Plasma: KDE Plasma Version: 5.20.90 KDE Frameworks Version:5.79.0 Qt Version: 5.15.2
Yeah, this is reproducible here too. Seems to occur to both Wayland and XWayland apps the same way. Neither "Delay focus by" or "Focus Stealing Prevention" seem to affect this.
This is a problem for me too. Using kwin 5.21.4 in Arch
Probably a duplicate of #395970. Please be more detailed in what you do to notice that focus-follows-mouse is unreliable (that other bug report has a scenario).
*** This bug has been marked as a duplicate of bug 395970 ***