The black keep loading screen; spawn underwater death plus modified inventory

Finished the black keep with a clanmate. Exited the black keep to spawn underwater and died 2 seconds later. Lost my inventory. Clan mate was able to retrieve. My items were modified. I had two upgraded weapons and a shield. I got back two upgraded steel picks (who needs that) and a hardened steel shield.

Is this a bug or something else altogether?

That door flat out doesn’t work in my single player game there’s probably a lot wrong with that door knowing this