Hey there! We're here to help you! You can make sure that auto sleep is off by going to Settings->Device->Power, and turning off the Auto Sleep function. If you need more help, please click HERE to send us a support ticket. Thanks!
I have only auto wake headset and auto sleep headset in setting/device/power for auto sleep headset I don't see turn off function and I tried to set to 4 hours, it's still sleep (I'm watching youtube in vr about 3 minutes)