Using my Z7+ and using the playlist feature under portals, I have loaded the provider's url and my username and password. When the channels load, I go around and add channels to the Favorites category. A day or two later, the channels are different, not all but some of them. This has happened with two different providers. When I use the provider's M3U app and when I use my MAC, the channels I favorite stay the same.

This happens only using the playlist feature based on my experiment.

Any help is appreciated.