People who can kill me on a ship

[Cabinwrecker]

A long time ago, I befreinded this lv 12 pirate. He's been offline for months, then he suddenly tp'ed to me while sailing. He was a undead pirate and attacked me. I killed him. Now everytime I sail, he attacks me again. I asked him and he said that some guy had a unrealesed item that turns him into the undead. I know that's false. Disney would never do that. Is it a glitch, He used to be a real good pirate but I will remove him in he keeps this up.