Icon in Notification Tray orphaned when last window is closed

[jbrains]

Quick Summary

The VLC icon in the Notification Tray is orphaned when I close the last VLC window, then that icon sticks around and does nothing until I force redrawing the Notification Tray by removing it and adding it again.

Environment

• Pop!_OS 24.04 LTS
• cosmic-comp/noble,now 0.1~1768340154~24.04~4adb074 amd64 [installed,automatic]
• pop-de-cosmic/noble,now 3.0.0~1767820609~24.04~63ed24e amd64 [installed,automatic]

What else might be relevant?

Steps to Reproduce

1. Play a video using VLC, so that 1 VLC window opens. Icon appears in the Notification Tray. All seems well.
2. Close the VLC window without using the Icon. (Not sure if this is essential, but it's what I did.) Window closes, but Icon remains in the Notification Tray.
3. Try using the VLC Icon to Exit VLC. Nothing happens/no response. Dropdown menu does not disappear; VLC Icon remains in the Notification Tray. There is no vlc process running.

Expected Result

VLC Icon should disappear from the Notification Tray once VLC is not running.

Logs

Upon closing the VLC window, I get this log entry:

Jan 14 11:03:31 quincy cosmic-comp[3237]: Failed to handle X11 event

Upon right-clicking the VLC Icon to try to Exit, I get these 2 log entries:

Jan 14 11:04:12 quincy cosmic-comp[3237]: Client bug: Unable to re-configure repositioned popup.
Jan 14 11:04:12 quincy cosmic-comp[3237]: Client bug: Unable to re-configure repositioned popup.

For this I see 2 messages per right-click event.

Workaround

Remove the Notification Tray applet, then add it again. Now there is no VLC Icon in the Notification Tray.

[jbrains]

If I open VLC without playing any media, then close it before playing any media, then the Icon in the Notification Tray disappears as expected and there is 1 log event:

Jan 14 11:10:50 quincy cosmic-comp[3237]: Failed to handle X11 event

[jbrains]

If I open VLC then play media, then close it, then the Icon in the Notification Tray remains and the behavior is as described above. There is also 1 log event:

Jan 14 11:11:57 quincy cosmic-comp[3237]: Failed to handle X11 event

[jbrains]

Merely moving the Notification Tray using Settings is enough to force-redraw the Notification Tray, then the VLC Icon disappears.