museeks: tray icon does not appear in Gnome

Hi there, I am using Solus 4.1 Fortitude with GNOME Shell 3.38.1. I just updated Museeks to version 0.11.4 … using the AppImage method and since then when I close application’s window:

• the tray icon does not appear
• I can still here music
• museeks process still runs and I have to kill it in order to close the app

processes are show here:

any suggestions ?