With DVBViewer Client, not all channels are opened in one session

Greetings,

I have a TBS 5990 USB Tuner connected to a computer, I use it with a DVBViewer and a client connected to a WeTek Play 2 device.

There are 6 or 7 TPs in total, ie 50-60 channels.

But when opening channels in WeTek Play 2, some TPs do not come from the channels, so they do not play videos.

I mean, not all channels are open, it's a pointless problem, but that's really the case.

I could not find the source of the problem, what could be the problem?

Best regards...