(Originally reported over xJon/The-1.12.2-Pack#916)
Currently there doesn't seem to be a way to prevent world generation features from being fluidlogged (or "sunk") by default. This means things like Quark's ships have their bottom part (that is submerged in water) "sunk", when Fluidlogged API is installed. Changing fluidloggedFluidSpread modes did not help.
Having a workaround for this would be useful!

just going to add a few pictures to this. 2 ships for Techguns, one picture is with fluidlogged installed, one picture is after removing it (different location, same world)

there is also a 3rd image from an underwater base from "modern ruins", showing how annoying it really is