AppImage down show the correct icon in Gnome dock

[sezaru]

I use gearlever to install https://github.com/jeffvli/feishin which is only released as a appimage.

The issue is that the app icon is not used when the app is open in Gnome.

Here is the app icon correctly used in the gnome app list:

Here is the icon it uses when the app is open in the dock:

Even if I try to pin the app, it will still create a new icon in the dock instead of using the pinned one: