[BUG] Flatpak version's menubar icon disappears after opening / closing the menu few times

[sidevesh]

Describe the bug
If the menu bar icon of the flatpak app is opened and closed a few times,
then the icon vanishes,
running the app from the flatpak runtime in console to see the error, I see following error when this happens:

** (process:38262): WARNING **: 17:23:02.912: Invalid client serial

To Reproduce
Start the flatpak packaged app
Click on menu bar icon and close it
Repeat few times till it disappears

Expected behavior
Menu bar icon should not disappears

Desktop (please complete the following information):

• Application version: 4.6.0 Flatpak, Arch Linux

Another error I saw when closing the app window that may be relevant:

[IME] Error while destroying the context:
Tmds.DBus.Protocol.DBusException: org.freedesktop.DBus.Error.UnknownMethod: Method Destroy is not implemented on interface org.freedesktop.IBus.Service
   at Tmds.DBus.Protocol.DBusConnection.MyValueTaskSource`1.System.Threading.Tasks.Sources.IValueTaskSource.GetResult(Int16 token)
   at Tmds.DBus.Protocol.DBusConnection.CallMethodAsync(MessageBuffer message)
   at Tmds.DBus.Protocol.Connection.CallMethodAsync(MessageBuffer message)
   at Avalonia.FreeDesktop.DBusIme.DBusTextInputMethodBase.Dispose() (IBusX11TextInputMethod #13780214)
[17:23:01 INF] MainWindow.TitleBar: Close requested, minimizing to tray bar

[sidevesh]

This issue is still present on the new version that was released on Flathub 3 days ago

[timschneeb]

This appears to be related to a bug in Avalonia: AvaloniaUI/Avalonia#15551