It happens a lot . Try doing a hard reset on your Xbox .
Also from what I learned from My Turtle Beaches .
I will turn my headset on before I turn the Xbox on .
I don't know why but that semmed to work for me .
But also what i started doing religiously now is . Every time I jump off Xbox Now . Instead of just using the controller to turn it off As most of us are use to doing
I always turn mines off by doing a Hard reset lol
Its a lot of stuff to take in lol But I hope it helps