[Freeswitch-users] no hangup on B leg

Hi all, I'll slowly pulling my hair out on this one. I had FS successfully hanging up both legs on a bridge, now today, with nothing changed, I'm not seeing a hangup of the b leg at all. FS is behind a PIX, so it might be a weird NAT issue, but A leg calls hangup just fine. Before when I had an issue with the B leg not closing the bridge, I was at least getting a hangup event, now it's not being fired. Does anyone have an idea what might be causing this? Regards,