International Channels no longer work on Cable Card?

Hi. I wanted to know if other people are having this issue. My grandma just got Comcast service and her RAI Italia channel was working fine until late last month. She had a TiVo Bolt VOX and a Comcast Cable Card. We called a “technician” out to try and fix the issue, he hooked up an X1 box and it worked. But that’s not what we wanted for my Grandma, x1 is too hard for her to record and navigate which is why she would rather use her TiVo. I need to get her back to the TiVo because she can’t navigate x1 and she can’t watch it on her other TVs in the house.