I don't know.
Open ProgDVB, play one channel, change channel... Close ProgDVB. Open again ProgDVB, play one channel, play another channel... Close ProgDVB. Open ProgDVB and look for problems with channel list, or check random channels.
P.S.: "BNT World" from my last screenshot here is missing in channel list now. I don't have any idea why.
This channel on the server exist.