Tivo CableCard "D261" issues.

Hi.  I swapped out my Tivo Bolt for an Xfinity box because the CableCard was dropping channels with "Channel Unavailable/D261" errors. Xfinity swapped out the CableCard, but that did not fix the issue. The Xfinity box is cludgy and unintuitive compared to Tivo. You can't switch between channels and then rewind those other channels as sports fans love to do and where Tivo really shined. 

Does Xfinity have plans to address the issue of broadcasting IPTV channels through their cablecards so that Tivo Bolt and Tivo Edge would not be dropping channels I've paid for from their UI?  It boggles my mind that this issue has not been addressed by Tivo and cable providers such as Xfinity.  

Thank you.