Tar lamp looks like boat torch

I'm just start new shipwrecked world with hamlet compilation for testing (on my other world i just dig up treasure and hounds will spawn too)

I wanted to check this in another world, so I entered the command c_freecrafting() for duplicate exclusive Woodlegs hats and make more treasures 

I created primates with the console, gave them hats and when night fell, I accidentally made a lamp instead of a lantern and put it on the light slot of the boat then I noticed that instead of a lamp a boat lantern is displayed, but this is a visual bug