Pushing amethyst clusters multiple times with a sticky piston causes amethyst shards to duplicate

• Pushing an amethyst cluster with a sticky piston will drop 4 amethyst shards, but the amethyst cluster does not break. You can duplicate amethyst shards.

Steps To Reproduce:

• Place a sticky piston
• Place an amethyst cluster on the sticky side of the sticky piston
• Power the piston more than once