Pressing ANY key makes my hidden widget to show.
This doesn't happen with every widget every time. But it has happened with rectangles, data grids, dynamic panels, etc... many times.
This happens in different browsers (Chrome, Safari, Firefox) and with Mac and Windows.
You can take a look at the file here:
This is quite nerving and has happened to several files now. Is this somehow my fault or is this a bug?
(MacBook Pro 15" Retina, Mavericks, JIM 5.6.1)