I just had a rather unusual problem last night, my XBOX ONE stopped responding to A button commands.
Further troubleshooting revealed that the issue carried over to SmartGlass control input from my phone. I could use the sticks or the bumpers, even the home or menu buttons, but the A button just wouldn't respond. Rather, let me more specific. I could see that the xbox was registering the button presses because onscreen buttons would animate as if they were being depressed, but nothing would happen. Of course the A button had to be the most used to button so, my console was effectively useless. It happened to occur just as I was selling my family on getting a console of their own. They just might get one now..after they stop laughing at me.
Anyone else experience a similar problem? Based on the behaviour, this appears to be an issue on the console and not with the controls since it was affecting devices that use different communication methods.
A hard shutdown fixed this problem, but I've had similar issues in the past that I'm now wondering if this is an ongoing bug that might have been introduced in a recent dash update or maybe has been there from the beginning and I'm just now being affected.