[Freeswitch-users] calls dropped after refer with replaces

Hello, when I send a refer with replaces from my polycom, the calls are dropped with which I'm trying to do an attended transfer. When leg arrives in CS_PARK and the other in CS_HIBERNATE. An unbridge happens afterwards on the leg that sent the refer-replaces, but in the end all legs are dropped. Any idea why this could be happening? I tried to look at the sourcode, but I couldn't find my problem yet. Thanks, Michel