This one makes me feel really stupid, but here it goes.
Can you waterlog doors in Minecraft 1.13? I've tried right clicking the door with a water bucket, top and bottom, shift-right clicking the door with a water bucket, top and bottom, and crying on the door top and bottom. I can't find anything online, but I thought I had read about this before.
Is there some kind of command? Is there a piston trick? I would like to be able to do this, but I can't think of anything else to try.
PICTURE OF WATERLOGGED FENCE AND COBBLE WALL.
EDIT I tried placing the door in water (fully surrounded except for base block which is necessary for door placement:
No such luck.
I tried placing a waterlogged block above it:
Yet again, no luck. ):