I reported what I thought was happening here. On my side, I clicked the button to teleport me, it put me under the world. While I was looking for the item that was preventing me to use the rescue button, the person came in and killed me. To me looks like he was intentionally under the world doing shady things.
I was provided a video showing what it looked like from their side. Looks like he was legit and I am in the wrong here. I apologize.