i.e. connection.. as I told before..
basicly, for me..

I've just made a simple test: using nightly20 I sent some messages but they remained red.. normally I disconnect wazapp and re-connect it, so that I can delete messages and re-write them to be sent..
Now I have not disconnected wazapp, but I have closed it and unistalled it, returning to nightly17.. --> messages that were red fastly have become yellow and then green..

Nightly17 manage connection better!