Hi, here's an example of the back button not working. The issue happens on many aps, while sometimes it works all OK, other times I can just keep pressing it as in this example and it just won't work. Also, the navigation bar is very thin, which means that even when the button is working fine, it's easy to miss the spot on the screen to activate the button, so would be good if users could have an option to re-size the height.
