[Freeswitch-users] Whar is mean "ending bridge by request from write function"

Some calls is droped during a conversation What is means "[DEBUG] switch_ivr_bridge.c:579 sofia/internal/ 1246@client-1424.rcsnet.ru ending bridge by request from write function"? In example message at 11:01:05 https://pastebin.freeswitch.org/24241