Yes this is clear. If the client is not fast enough, sooner or later some data is lost. The problem is that from the server side I have to be sure that no client can undermine the stability of the server, so I imagined a flag solution in the OnDataSend event if this can be enough. So far I have never had problems with ICS (I like them very much) while also sending MB of data but with the unstable client I need to find a solution.
Thanks