Act4 - Whakapanu island - Dread crab - SSF HC

Hello,

Just went in whakapanu, exploring the whole island as always to get everything in the area.
Discovered everything and finished with the dread crab.
When I approached, he came out from his cavern and then walked back in and disappeared.
Never get to see him again, and I couldn't reload the area.
No options from the menu to respawn or anything.

Have fun
Talane