iVMS-4500 only one camera playback over P2P

I use iVMS-4500 app with Cloud P2P connection to DS-7204 HGHI/E1 DVR. Live View is doing fine, but in Remote Playback i Can see only one camera at the time. On other installations which are connected directly (HiDDNS, portforwarding) I can playback normally, up to 4 cameras simultaneously.

I searched around, but haven't found any official explanation about this.

Is Cloud P2P really limited to playback only one camera or I did something wrong?