same issue here, it starts off in Dolby 5.1 and after 20seconds switches to Analog input.
Pressing AD forces this into 2.1 or 3.1 mode..
Received an update on this from the BT Care team today after I raised a case with them. Apparently they have fixed the issue and a new firmware update is due for release in "autumn 2013", which should be any time now. So keep an eye out and post back if this issue has been resolved for you.
Yes - I get exactly the same issue here: no Audio after about 3 minutes of watching a BT Sport/ESPN HD channels. Very annoying. I hope the firmware update you mentionned is available soon. Surely 'Autumn 2013' has been and gone though!!??!!
Will try the work-around that people mention, but HD TV is the whole experience of 5-channel audio as well as the HD video.
I am still having problems with sound dropping out for abot 6 seconds at a time while watching BTsport.
Was it fixed with the latest firmware drop?
Is anyone else having this problem now?
Same for me. Getting proper fed up of this now. I've had the service for a couple of months but every weekend when I want to enjoy the BT sport channel in HD I get audio drops and picture break up. I'm on the fastest package and paying the top price so this is unacceptable.