Filled cauldrons have the wrong map color

I builded a large powderd snow cauldron field next to my ice farm but when i made a map of it i saw there was no special texture for filled cauldron's

Reproduce

• Get a filled cauldron with a non filled cauldron next to it
• Get a map and open it
  The map textures look the same

Expected Result

There would be a specific map texture for filled cauldrons

Code analysis

Code analysis by [Mod] Avoma in this comment.