I'd like to inform other users of new bug I found and logged, that never had place in CC versions prior CC 19.0 - 19.1.2.
If others are experiencing it as well, there is created a special topic you may join and share everything you found about:
I am Windows user, but if there is some Mac's please tell us how that is for you using equivelent 'win' key (if there is any).
Not really an equivalent mac key.
Traditionally on windows the Win key was used to show the start menu and taskbar (if hidden) and since macOS has no start menu or taskbar, i don't think the bug applies on the mac side.
Good to know it, so still there is bug for Windows.
The fastest way I found to make pressing left WIN key displayed bottom bar & start content is pressing left or right/gr ALT in first instance. Still that is bug that should be disposed, especially that wasn't done for last SEVEN and a HALF months! Fix it!