Additional informations:
In the original context where I could reproduce everytime, I had 12 clients on the server, 6 of my own connections, 5 of the same person else, and 1 of someone else.
I tried writting a small code to reproduce it (locally), I couldn't.
I just tried again under the same condition (6 of my own, 5 of the same guy, but the last one was a different person this time) and I cannot reproduce even once.
There must be something else than not sending any data for a few minutes and then sending again.
Note that the original context is a game where the server sends data to all clients each 45 ms (eventually clients send data to the server).
