[Freeswitch-users] Verto - call hold

Can someone confirm me this behaviour regarding verto. I am using call waiting functionality, so user can have many active calls. One active, other are ringing, for example. Then I tried to play with call hold. If I put active call on hold and accept another call, put this one on hold and unhold previous call, sound is lost (mic is working, but speaker is not working). It looks that call hold/unhold is working only on last received call. Anyone else find this behaviour? Will try to reprogram our code so that each call will use its own video tag. Maybe this will solve my problem. Best regards, Gregor