I've just created a note file. Initially, the file opened in one of the panes in my current layout. I then opted to open the note file in a floating window via right-click menu. Then when I tried to click off the note file to return to the main window, nothing happened. The only way to return to main window was to minimise the note file floating window. After this the window functioned normally.
However, this doesn't seem to occur when I open a note file directly into a floating window.
Not sure if this has happened to anyone else. A minor problem, but a bug nonetheless.