I am also having this issue, although it only started appearing its ugly head just recently after the latest major patch. The peculiar thing is that it happens to my PC as well as my wifes PC at the exact same time. Have tried the port forwarding indicated in the earlier posts for one of our machines, tried going off router and a single machine direct to modem, same problem exists. Because it happens to both of our PCs at the exact same moments, I would imagine that it must be on the SE side. We had wireless previously, but switched to Wired controllers since we thought it may have been an interference issue. No dice, wired controller has the same problem. This is a major issue for us. Hopefully they can address it soon.