Encrypted Channels not working stable

[c-o-m-m-a-n-d-e-r]

Hey,
i'm testing with HRTunerProxy and a Dreambox 900 in combination with Plex at the moment.
I can look all my Channels on the Box or with VLC direct.

FTA Channels working without Problems over Plex, but encrypted Channels buffering a lot. Working a few seconds, then buffering again.

Don't know whats going on.

Any Problems known atm?

Thanks

(Have legal Subscription Card for my Channels)