It seems that some devices weren’t playing too nicely with the rapid finger swipe method of accessing the menus if you turned off the System bar and enabled full screen mode. To make things a little easier I’ve added an alternative method of accessing the menus. The process is fairly straight forward
1) Long press on the screen (any non-clickable element is fine) for 3 seconds then release
2) Repeat this 4 more times.
3) Short tap twice, make sure you don’t double click.
If you scroll the page or short tap when you should be long tapping or long tap when you’re supposed to be short tapping then you’ll need to start again. You can scroll or short tap to reset the sequence if you get lost.