duplicated messages delivered on an enviroment with open and close net frequently

[Nododo]

#169 (comment)

i meet the same problem,it happens by open or close net frequently

i see the above issus show send message not in main thread,but the log before

[self.transport send:wireFormat];

shows always in main thread,but it can also happen

i use the latest version, so anyone can help me？

thanks！

[Nododo]

one more:

if connect with vpn it happens more frequently