No sound using Contour on some channels

In using Contour on my iPad and iPhone, I can't get a full screen shot with sound.  The picture is good, but the sound cuts out after about 8 seconds.

If I minimize the screen size, the sound returns.  Random channels have the problem, but the one I watch most is NBC.

I've talked to 3 COX tech support people with no resolution.

This started about 14 hours ago.

Please help!