Swimming 1/2 through the tunnel results in insta-death. Death message is “Falling through world map” Retrieving corpse is impossible. This bug can be reproduced. Swimming into tunnel from north or from south results are the same.
Huh, alrighty thanks for the report! We’ll get it looked into.
No problem. I reported it the day it happened. Lost my gear, no problem, just continued to die there everytime I tried to go back and get my corpse.