Same problem for me too with SH3 ... I just don't get it because I have been using the zgemma for over a year now which sends identical data packets :(
I have tried various things so far - disabled loads of security features on the SH3 and played with settings to no avail. I have tried connecting through wi-fi and ethernet cable and both yield the same results. I have tried creating a guest network and even with the V8G connected to the guest network, it still does it. I have also tried putting the SH3 into modem mode and connecting a tp-link router and connecting the V8G to the tp-link but still the same.
It has to be a an issue with the cam settings on the V8G ... In the meantime, i've got VM to send me a SH2AC but I would love to be able to get it working on the SH3 :(