XBOX ONE - controller keeps disconnecting

Hi all,

please help. My controller keeps disconnecting (white logo of XBOX is always up) in NHL 15 and also in menu. For example....in the end of the period I cannot resume back to the game and I have to restart my controller. I am using 2 months old battery which is fully charged. I have this problem also when I play with a cable. I am not using kinect (he is not even connected to my XB1). There is no problem with controller in the XBOX menu just in a game. I have tried second controller and everything seems to be fine. I think 1 or 2 weeks ago I ran an updates on both of them. I´ve never had this troubles before and I hope you will know what to do. THANK YOU!

Tomas