[Freeswitch-users] Capturing leg B hangup from bridge

Hello, I'm trying to use hangup api hook for leg b, while leg a is still connected and transferred to do other tasks. The hook only triggers when leg a disconnected, not when leg b. I found this question on Google, but no answer that works. So how can I execute API (curl in this case) when leg b is disconnected? Thank you, Ido