Might be an issue with the TIVO firmware. I had issues with a TIVO premiere and an earlier version of the tuning adapter a few years ago. Had to reboot daily. But since reconnected, neither the Roamio or the older Premiere have given me issues beyond the occasional switch channel one.
The tuning adapter has 2 states for each physical channel. It sounds like yours is getting held in the active state. Instead of a full reboot, you could try unplugging and replugging the USB cable. But a better suggestion is to work with TWC on the issue. Forget the local office and the installers. TWC has set up a number for cable card and tuning adapter issues. They seem to actually know the product and have been helpful in the past. I have had better luck with this group than with the TIVO level 2 support. Their direct number is (866) 532-2598