I have very weird behaviour when some calls hangup, freeswitch freezes for exactly 10 seconds as the log shown below.

I don't see any trace of error but for 10 seconds even the audio is not delivered, I guess is some timeout related issue but I don't know where to look

any clue?

2014-02-12 18:39:25.668742 [DEBUG] switch_core_state_machine.c:579 (sofia/external/spyU0lQL2Zyb210ZG0tMDAyMDNiYjQ=@10.10.20.6) State DESTROY going to sleep
2014-02-12 18:39:35.668734 [DEBUG] switch_core_state_machine.c:48 rtmp/default/chanspy_001-1392227350.2513709 Standard HANGUP, cause: NORMAL_CLEARING