My M3U has lines like the following:
#EXTINF:-1 tvg-id="2" tvg-name="WKRN" tvg-logo="http://vault:9191/api/channels/logos/489/cache/" tvg-chno="2" tvc-guide-stationid="11624" group-title="Locals",WKRN
http://vault:9191/proxy/ts/stream/50e62333-3dfa-43c2-9549-e0582b8c47d0
You can see it has tvc-guide-stationid value which is correct. But I get no guide data and when I go into manage lineup my channels are not mapped to any guide info at all.