Try this suggestion from Tony. I had the same problem with TCM. Hope this helps.
“Good news, based on what I have found out you should be able to restore the captions to TCM by making some setting changes on the rcvr.
If you go to the Home Screen -> Menu Tab -> Settings -> Accessibility -> Closed Captions you can change the Captioning Service to 0 which will restore captions on TCM. “
You hit it right on the head. I think when they had a software update something changed and that's what it was.