Hangouts update issue - send the same SMS several times

Hi everyone and I thanks in advance for taking your time to help me with this. The problem is the next, a few days back I installed the leaked APK of Hangouts, I chose obviously that Hangouts handle my SMS Messages and everything was working like a charm, but yesterday, as we know, Google released update at the Playstore of Hangouts and the app updated automatically, today I sent a couple of SMS to my girlfriend and she told me that she recieved the messages several times (between 3 and 5 times per message), she text me an hour ago and told me that still receiving the messages, I saw his phone and indeed, I saw like 10 times the same message, but in my Hangouts thread appears only one time, so...anyone else have the same problem after yesterday update? it's a bug? should I blame to my carrier?.

So again thanks in advance.

Regards!