Mao Kun currently has a bug where the guy you need to talk to spawns outside of the map and this makes it so you can't get any booty chests or complete the map, it has happend to me multiple times.
note that it isn't really necessary to create forum post if description is provided as /bug parameter.
A picture is worth a thousand words, so if you take a screenshot and post it to the forum that can often be extremely helpful for us. But not every bug needs it: a screenshot of you looking sad in your hideout because you were disconnected from your map isn't terribly useful.
OP's terrain generation bug will be fixed in 3.9.0, btw.