While the address bar is hidden from scrolling, it automatically becomes visible when touching a comment or text entry box. The keyboard on an Android phone already takes up about half or more of the screen as it is. Then when the address bar appears, you have just a 10th or so of screen left to see what you’re typing. Almost every other browser keeps the address bar hidden while typing to maximize how much screen is visible while entering text.
This is and has been the biggest issue keeping me from using this browser on Android. There simply is no good reason to have the address bar appear when typing in a text field. If someone needs to type in the address bar, they can scroll to make it appear and then type into it. But it should always be hidden when typing in a text field, comment box, etc.