Don't normally watch or record that TVE channel 6089, but am seeing the same issue here with Xfinity as provider.
Channels DVR v2025.04.07.2002
2025/04/15 17:16:19.259280 [ERR] Failed to start stream for ch6089: TVE: notAuthorized
2025/04/15 17:16:19.259399 [HLS] Couldn't generate stream playlist for ch6089-dANY-ip192.168.1.8: TVE: notAuthorized
2025/04/15 17:16:22.068034 [ERR] Failed to start stream for ch6089: TVE: Stream Not Available
and after updating to latest pre-release
Channels DVR v2025.04.15.1945
2025/04/15 17:20:18.023325 [ERR] Failed to start stream for ch6089: TVE: Stream Not Available
2025/04/15 17:20:18.034434 [HLS] Couldn't generate stream playlist for ch6089-dANY-ip192.168.1.8: TVE: Stream Not Available
2025/04/15 17:20:20.494928 [ERR] Failed to start stream for ch6089: TVE: Stream Not Available
Sounds like TVE to me (unreliable)