Cauldrons still show Water Texture while Underwater

When you place a cauldron underwater, and fill that cauldron with water, the water texture of the cauldron still shows, which looks very strange.
It actually looks like the cauldron is filled with air, not water.

And I might as well say that there is also the flowing water textures on the sides of the cauldron, but that's besides the point. It was also be kind of nice if that could get removed as well.