Amethyst can be duped by pistons
how to reproduce: try to get a amethyst cluster, second step: build a repeating redstone contraption that is attached to a piston with two slime blocks on it (or you can just get a sculk sensor attached to a piston) final step: activate the redstone contraption (or the sculk sensor)
Linked issues
Attachments
Comments 1

Thank you for your report!
We're tracking this issue in MC-203561, so this ticket is being resolved and linked as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
Quick Links:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki