I tested falling into the void and see if it would respawn me on the island and it did spawn me at the original y spawn offset value but i was stuck. I couldn't move or do anything. If I left clicked, it would freeze the game and I'd have to kill it from task manager. Using version 1.3.2
EDIT: It was with a custom island.
EDIT 2: Just tried it again to see if maybe it was something I did. I got this:

[Server thread/WARN]: Player marckskl tried to attack an invalid entity
[Server thread/INFO]: marckskl lost connection: Attempting to attack an invalid entity
[Server thread/INFO]: marckskl left the game

This was still on single player when respawning and left clicking.