We have just got our T6 TiVo box and it's really frustrating. We paired the remote with no problems, and for a while all was fine. However the remote is now behaving erratically. It rearely works at all on start up, then might change a channel with up/down arrows, but nothing else and definitely won't work via Bluetooth. You have to do the IR remote dance around the room to get it to do anything. As the Bluetooth thing was a key factor in upgrading I'm really annoyed.
We have tried repairing using both methods and the pairing seems to work, but with the above problems still extant.