What I have seen posted elsethread(s) is that the red area being visible/invisible when you're gone is not an indicator of safety. You'll get hit if you're in the red when the mob finishes casting its ability. In other words, when its cast bar hits 100%. Which doesn't always match up with the red area disappearing.

For Elusive Jump, it might also be that the client doesn't send your new location to the server until after you've landed (for varying values of "after").