Just last night any channel streams not tagged with guide data, show Adult Swim Rick and Morty. So I have to tag channels even if they don't have program data, like my local news channel's internet stream.
Need more information. What device and app and screen were you seeing this on? How are those channels configured and where are they coming from?
The server is running on windows 10, the devices are both a Google tv with chromecast, and my Note 20 ultra. News Channel 21 stream https://dai.google.com/linear/hls/pa/event/psvozCdDTzmBHCZEASGMrg/stream/c514bb2d-9647-4f84-a2fe-637342ce3296:DLS/master.m3u8 also to test the theory I removed the guide data from Folk Tv, and it also ignored the stream I configured and showed rick and Morty, im running the latest prerelease.
Can you post a photo of what you're seeing?
If these are custom channels then maybe there's a problem with your M3U. What is the M3U text you're using?
Please click Settings > Support > Submit Diagnostics > Other in the app on your TV
Ok i did it from the phone app, and the Google tv app