Unplug your Xbox and plug it back in, it does a hardware reset and you can sync it again. I had the same problem until it just wouldn't connect or work.
If you haven't figured how to fix the controller already, unplug ur Xbox one /Xbox one s from the back, wait a few seconds then plug it back in,. Now sync the controllers and it should sync and respond.
Unplug your Xbox and plug it back in, it does a hardware reset and you can sync it again. I had the same problem until it just wouldn't connect or work.
If you haven't figured how to fix the controller already, unplug ur Xbox one /Xbox one s from the back, wait a few seconds then plug it back in,. Now sync the controllers and it should sync and respond.