Cauldron water briefly changes color when pushed by piston

The water in a cauldron that is pushed by a piston will change color just briefly. I came across this when attempting to reproduce the crash caused in MCPE-14805

Steps to reproduce
First of all make sure you're testing this in creative.

• Place down piston or sticky piston.
• Place cauldron in front of piston.
• Fill cauldron with water or potion.
• Place redstone dust and add a lever to power it. (See photo attached.)
  The water in the cauldron will change color just briefly. If that doesn't happen then the game will just crash (see MCPE-14805)

Edit by Zeb: Fixed in 1.1.0.8. Pushing a cauldron filled with water will always look like it should.

However, now there is a new bug: pushing a cauldron filled with any liquid will cause the liquid to look like water while it is being pushed.