Same problem on COX on Windows 10 on version 2022.09.29.0034.
It is definitely working at https://watch.hgtv.com/channel/hgtv
Submitted diagnostics: 52bb1f27-444f-4d26-b9c3-4a09aa190099
As a test, I downgraded to 2022.09.23.0124, but it was the same. It was apparently at least working on Tuesday night when it last recorded an HGTV show.