Quick Popup window is not reliable on Wayland

With KWin Wayland, the following error is printed:

"qt.qpa.wayland: eglSwapBuffers failed with 0x300d, surface: 0x7be3c8512b70"

After switching visibility fast with ToolTip (I assume this might have something to do with the fade animation), which is a use case when the visibility is bound to some kind of interaction such as mouse hover, the popup can no longer be visible.

At the same time `ToolTip` derives from `Popup`, but it does not seem to respect the option `UI_FadeTooltip`. Is that a technical limitation?

Feel free to close it if it is a KWin Wayland bug.