Apple TV 4th Gen sticks in ERG modes

My Apple tv tends to get stuck in ERG mode whereby I cannot feel the change in gradients. i have shut off all other BT devices. i have checked BT functionality via iPhone and iPad and all working fine. all works fine via laptop with ANT+ as well. it is only apple TV that seems to be stuck in ERG mode. i have tried deleting app and reinstalling… any thoughts? Thx