live tv - "Unable to load Channel Data from the server" on some channels

Certain channels error out with subject error message. I can paste the same stream url as is listed in the .m3u file into VLC and it plays, so the url is known to be good. What specifically does this error message mean? Does it mean that Jellyfin cannot get the stream url data from the .m3u file, or that it can not stream data from the stream url listed in the .m3u file?
System

OS: Ubuntu 20.04.1LTS
Virtualization: none
Clients: Roku 4200x, 4260x
Browser: n/a
Jellyfin Version: 10.6.4
Playback: IPTV stream
Installed Plugins: AudioDB, MusicBrainz, OMDb, TheTVDB
Reverse Proxy: none
Go to Live TV
Try to play certain channels.
Error “Unable to load Channel Data from server” occurs.

Expected behavior - channel plays normally.

Additional context - What specifically does this error message mean? Does it mean that Jellyfin cannot get the stream url data from the .m3u file, or that Jellyfin is unable to stream data from the stream url listed in the .m3u file?

same here:

OS: Ubuntu 20.04.1LTS
Virtualization: Proxmox
Clients: GigaBlue UHD UE 4K with OpenWebif
Browser: Chromium, Firefox
Jellyfin Version: 10.6.4