No idea why but I just finished 400 days dlc and almost a third of the time I can't make any choices because instead of the PC choice menue it gives me the Xbox buttons. Sometimes it will only be the first second and then fix itself but most of the time it stays until the timer runs out. Basically 30% of the time I can't choose the dialog. This is really annoying. I am on PC, steam and use keyboard+mouse as I always did with all 5 seasons where I didn't have this problem.
here just 1 example http://i.imgur.com/Qn5ZDO8.jpg