I recently removed my Blue Ray player from my A/V set up and replaced it with a Amazon Fire TV box, I plugged the box into the same HDMI in port on my Denon AVR 789 receiver that I had removed the Blue Ray player from and it worked fine. The issue I'm having is with my Xbox One, also running through the HDMI on the receiver, when I switch the HDMI input to the Xbox it works long enough to show the Xbox home screen but then the receiver switches back to the Fire TV HDMI input. At first I thought it might be because the Fire TV box is essentially always on but that doesn't make sense because at one point I had a cable box, Blue Ray player and the Xbox all running through the HDMI and would switch between them with all three on and never had this issue before, any ideas?