If you place a piston, extend it with a redstone block, place another redstone block next to the other redstone block, extending the line of redstone blocks and break the redstone block extending the piston, the piston will still be extended, but if you update the piston, the piston will retract.
Related issues
Comments


Duplicate of MC-108.

Thank you for your report!
We're tracking this issue in MC-108, so this ticket is being resolved and linked as a duplicate.
That ticket has already been resolved as working as intended, which means this is not considered a bug and won't be fixed. Please do not leave a comment on the linked ticket.
If you would like to learn more about this particular feature, see this article on the Minecraft Wiki.
Quick Links:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki
-- I am a bot. This action was performed automatically! The ticket was resolved by one of our moderators, and I left this message to give more information to you.
⚠️ Please do not mark Unreleased Versions as affected. You don't have access to them yet.
-- I am a bot. This action was performed automatically! If you think it was incorrect, please notify us on Discord or Reddit