Cauldron water does not change on dye use. I can't right click on it and dye it

Minecraft Java Cauldron water cannot be changed using dye.

What I expected to happen was...:
When right-clicked, the water would change in the specified color

What actually happened was...:
Doesn't let me right-click it, it's the same as right-clicking on a dirt block; does nothing.

Steps to Reproduce:
1. Put water in Cauldron
2. ... Have dye in arm
3. ... Right-click

4. ... Nothing Happens