Tray icon doesn't work

[adam-tj]

The tray icon isn't working when it is enabled.
On Plasma 6.2.4 X11 the icon is transparent and nothing happens when I click on it.
On Plasma 6.2.4 Wayland the icon is a grey square, if I click on it the square becomes temporarily smaller but doesn't do anything.
On IceWM I get a black square and nothing happens if I click it. The black square also doesn't go away if I close the app.

See bottom right of the screenshot, to the left of the volume mixer widget.

Here is the output I get when running the software on openSUSE Leap 15.6, Plasma 6.2.4 X11.

adam@thinkpad ~ $ ./.local/bin/plex-mpv-shim
2024-12-28 03:33:56,145 [    INFO] conf: Loaded settings from json: /home/adam/.config/plex-mpv-shim/conf.json
2024-12-28 03:33:56,289 [ WARNING] player: Could not find libmpv1.
2024-12-28 03:33:56,290 [    INFO] player: Using external mpv playback backend.
2024-12-28 03:33:56,290 [   DEBUG] mpv-jsonipc: Staring MPV from /usr/bin/mpv.
2024-12-28 03:33:56,290 [   DEBUG] mpv-jsonipc: Using IPC socket /tmp/mpv245613502174096 for MPV.
2024-12-28 03:33:56,491 [   DEBUG] mpv-jsonipc: Found MPV socket.
2024-12-28 03:33:56,531 [    INFO] root: Started GDM service
2024-12-28 03:33:56,531 [    INFO] client: Started HTTP server
2024-12-28 03:33:56,550 [   DEBUG] PIL.PngImagePlugin: STREAM b'IHDR' 16 13
2024-12-28 03:33:56,550 [   DEBUG] PIL.PngImagePlugin: STREAM b'zTXt' 41 1315
2024-12-28 03:33:56,551 [   DEBUG] PIL.PngImagePlugin: STREAM b'bKGD' 1368 6
2024-12-28 03:33:56,551 [   DEBUG] PIL.PngImagePlugin: b'bKGD' 1368 6 (unknown)
2024-12-28 03:33:56,551 [   DEBUG] PIL.PngImagePlugin: STREAM b'pHYs' 1386 9
2024-12-28 03:33:56,551 [   DEBUG] PIL.PngImagePlugin: STREAM b'tIME' 1407 7
2024-12-28 03:33:56,551 [   DEBUG] PIL.PngImagePlugin: b'tIME' 1407 7 (unknown)
2024-12-28 03:33:56,551 [   DEBUG] PIL.PngImagePlugin: STREAM b'IDAT' 1426 612

I have the same bug with Jellyfin MPV Shim