also just noticed (don't know if it's a bug or a fearture) that when show button for full screen is disabled, it gets reenabled if you minimize the app and then come back. In that case you have to click the button (leaving full screen) and click it again to get back to where it does not display the button on touch/swipe.

I'm probably the only guy using this phone who gives a hoot about this stuff, lol.