Yes maybe only your client registered for you ask for the megahealth, something goes wrong from sending that packet to the server. (orw was delayed to answer because of ping) .So sever had not seen picked it up, but already hit to rockso 75hp -> killed.
Yes maybe only your client had registered you picking up the megahealth, but something went wrong with sending that packet to the server. (or was delayed because of ping). So the server had not seen you pick it up, but already hit by the rocket, so 75hp -> killed.