This bug strangely deals damage at the wrong times. One example is when in survival mode on someone else's world. you go down a ladder. If the ladder is long enough, you get unnecessary fall damage when you should be getting none. In some cases it can kill you. This only works if you are on someone else's world and you in survival. My guess as to why it isn't working is the fact the in multiplayer the server get confused about whether to add fall values to the player or not on a ladder and ends up dealing damage at the bottom. Technically this big is in version 0.11.1, but there was not an option for it.