I've finally figured out how to reproduce-on-demand the issue where if you minimize the main Adguard window to the taskbar then right click on the taskbar item > Close window, the Adguard taskbar item gets stuck (it's closed but the taskbar item isn't killed - the workaround when this happens is to right click on the system tray icon > Open Adguard). Steps to reproduce; 1) Open the main Adguard window. 2) Press the minimize button (minimizing it to the taskbar). 3) Right click on Adguard in the taskbar and select Close window. 4) Adguard taskbar instance is still there, even though the main window is closed. You can't restore the window upon clicking nor close it by again right clicking and selecting Close window.