Some in-game UIs have no transparent black background in Pocket UI

When you use Pocket UI and open Smithing Table, Cartography Table, Beason, Furnace, Blast Furnace, Smoker, Enchanting Table, Brewing Stand, Grindstone, Anvil, or riding a Horse, Donkey, Mule or Llama, It does not show transparent black background unlike any other UIs (Inventory, Crafting, Loom, etc)