When typing in chat or on signs or even in command blocks it opens up the Xbox chat, completely ignoring the in game space to type unless I finish in the virtual keyboard this was how it always have been unless you plug in a mouse and keyboard. Now when you try to type you can't use any features you used to be able to such as using tab to auto fill or getting recommendations on how to type the command. The fact that this "feature" or bug got through beta testing is crazy as it makes it impossible for a portion of the community on xbox is now unable to play the game as they used to. I know this is a bug report but the best way to fix this is by making it optional in the settings to use xbox's virtual keyboard or using the external keyboard as it is on the windows 10 edition. 

I've seen this problem coming for a while and whether it's a feature or bug, is probably putting the game in the worst state I've seen it in for people who type commands on mouse and keyboard.