Phantom "winit window" appears in KDE panel

[codewiz]

When starting cosmic-term in the Wayland session of Plasma 6.2.4, two distinct apps show in the panel: "COSMIC Terminal" and "winit window":

It does not happen with cosmic-store nor alacritty.

[rzeigler]

This also happens in gnome sessions.

[Omar-Eldahan]

I am using Cosmic-Term on the KDE Spin of Fedora 41 on Wayland and this also happens to me.

[secretmango]

I suppose this happens because the terminal is a wrapper for alacritty?

Is there a standardized option to spawn wayland surfaces without registering them as windows? The plasma panel, and I suppose the COSMIC panel and dock too, do this, afaik.

maybe this could also be fixed by having the visible window as subsurfaces of the "winit" window?

[boredsquirrel]

I found a workaround in KDE:

[336d0b17-c70b-4f6f-8a89-e825f0aaf410]
Description=COSMIC Term hide
skiptaskbar=true
skiptaskbarrule=2
title=winit window
titlematch=1
types=1
wmclass=COSMIC Terminal

is the entry in ~/.config/kwinrulesrc

now only the main window is shown, that is also closeable with the "x" button (the other one is not) but it has no title (just the working directory it is in).