I'm not sure if this is a bug, but during a sail to the Lizardfolk settlement, the ship came under attack by kraken tentacles. The Causril Commune Sailor that you talk to for disembarking decided to charge one of the tentacles, then died.
Once he died, I couldn't disembark.
I had this problem on Sammi Booker.
This happened sort of happened to me as well, while traveling three sea scavengers spawned, and both sailors charged with the supposedly tough captain being one hitted, and the sailor almost going down in about 5-10 rounds... after using a ton of healing supplies at level 7 to survive, and killing the scavengers, the captain respawned and i was able to disembark.
These guys survived a large battle with the illithid on the surface and have been fighting tooth and nail ever since. They shouldn't be as squishy as to be one hitted by anything.
Pretty sure other captains are flagged as immortal just so that the scripts don't break. It's probably just an oversight in this instance.
This was a mistake, fixed now.