When pushing a budding amethyst with a piston, it disappears

Summary
Pushing a budding amethyst with a piston will delete the budding amethyst block.

Step to Reproduce
1. Place a piston
2. Place a budding amethyst above it
3. Push it with a button/lever
---> The budding amethyst is gone.

Original Description
When budding amethyst is pushed with a piston, it disappears.