Everyone seems very hostile in this thread, well on these forums but surprisingly in this thread. It is not the OP's fault he is getting knocked off like that and is an issue. I've never been put back to the start like they've mentioned but countless times I've had that odd lag where I don't get knocked back and then a few seconds later it's happened. It doesn't seem like lag at all and usually happens at a time where I have no lag whatsoever. It can't be server side because nobody else usually has it at the same time, although saying that I have seen 2 people have this issue at the same time once.

You all jump on the OP to tell them that it's not a bug but how can you be sure? Half of you probably don't even know what he's on about. It can easily be blamed on lag and probably isn't a bug but denying that it could be would mean you're fine with it. It does seem like very odd lag if it is and seems to be exactly the same amount of time each time it happens. Coincidental? Maybe, but could easily be something else causing it.