Icon in taskbar is disappearing with v1.16.11

I updated on Win10 pro Cryptomator from 1.6.5 to 1.6.11 (msi-version). Cryptomator itself works really good - thanks for the improvements!
At the moment I only observed an unexpected behaviour by the icon in taskbar. Starting cryptomator, the icon is shown. But as soon as I move the cursor over the taskbar (without any click) the icon disappears. This happens in normal user mode as well as in admin mode. Starting cryptomator again places no icon in the taskbar. Box “showing icon in taskbar / infoarea” in the setting menue\user interface is activated.
Just a little bug or failure by the user?

Issue is the same in v1.6.14