Chrome fullscreen windows
I am not sure how Cmd+Shift+F works for you to make window full screen. I am using Cmd+^(Control)+F to make window full screen and revert to normal.
If you are not using any extension like magnet, The possible issue might be that when you switch your window might not have been cycled, for which you will need to use Cmd+`(backtick) followed by  Cmd+^(Control)+F.