eM Client won't open from the windows toolbar

Hi, I have a problem with eM Client version 10.1.4588 and Windows 10 Pro.

While eM client is open and I am working on another program, sometimes if I click on the Windows toolbar at the bottom, it does not open eM Client for me.

I am forced to press the Alt key, so it opens the eM Client menu and shows me the screen with mail.