XR15 remote gives error sound when pressing Voice button
I have the XR-15 UQ remote and most of the time it works perfectly. But around 10% or 20% of the time when I press the voice button it makes an error sound instead of the usual beep to tell you to begin speaking. The TV will show "Listening" and then after a second, "Press and hold again". It may do this 2 or 3 times in a row and then finally make the standard beep sound and then accept my voice command.
I swapped out the remote from another Xfinity box in the house and still have the problem just with this one TV. If it matters, it's the family room TV with the XG1V3 DVR box. So two different remotes have the same issue with this one box and both remotes work fine with another box. Seems like the problem is with this particular box.
I have rebooted the box, reset to defaults, etc. Any Ideas? Should I try and get a replacement box?