[Freeswitch-users] Freeswitch channel is down but stays alive

Hi, In very rare case, some channels stay active till I execute uuid_session_heartbeat or any uuid command. I run Freeswitch 1.2.14 and there is an LUA listener handling calls' dialplans and hangups. In approximately 12 000 calls, 1 channel stays alive even it's state is down. You can see CLI output here: http://pastebin.com/Z8ycPX3g What do you suggest, where can the issue be? Also not only hearbeat, but any uuid command finishes the call. Thanks