It appears this ship doesn’t have a problem with PCs falling through it, but NPCs can step back against a wall and fall inside and become impossible to hit. Even the ‘teleport back to your spawn point’ just has them falling over and over inside it.
TeleportPlayer 152049.265625 260266.71875 -20128.003906
Wups. Talked too soon. You can back up into the mast and fall in underneath. So also PCs falling under the mesh there.
Though with a bit of playing around, you can climb the mast back out.