Created attachment 110558 [details] screenshot I use VLC 3.0 on Arch Linux running plasma 5.12. Under Wayland, "VLC" entry appears in plasma panel when I put my cursor on VLC seek bar. See screenshot.
Looks like a VLC bug to me. Can you post the xprop output of that tooltip window that appears? I bet it's either of wrong window type or is not transient to the main window.
there is no tooltip window. it's just an entry in panel.
same issue affects system settngs under Wayland on neon dev untable. In icon view, when I hover some icon, tooltip appears in wrong position and a new entry "system settings <2>" appears in plasma panel.
Bug about tooltip in System Settings - https://bugs.kde.org/show_bug.cgi?id=391649
Cannot reproduce the problem with vlc 3.0.3 and plasma 5.13 under wayland. \o/