Not a 100% sure, if killing a player really triggers this, but this happened two times during a same day: First time me and 2 buddies where playing together and we accidentally shot one of our buddies in the Ostry / Black Mountain area. About 10-15 seconds later when trying to loot his corpse to save his gear, the server stated the "No message received..." -thingy for a while and then crashed.

Second time was when we killed a player near Rify and again about 15 seconds after the kill was confirmed and we went to loot the body, the server crashed again before we got to the body.

Not sure if both of these were just a coincidence, but this is something to be looked after.