When I enable a texture pack with bubble column textures, it doesn't show up in the game, it will just appear as the original Minecraft bubble columns. As a texture pack creator, I checked the name of my texture pack bubble columns (Chiseled Plastic Blocks),

Enabling the texture pack,

but to no avail. I even tried changing the textures, but the same thing happens. From my knowledge, I think it's the code generating the textures for bubble columns inside the game's code that's affecting it. Perhaps try changing the code for the name of the bubble columns? Thanks