When a piston is facing dow, if you give energy to a block, it activates the contiguous pistons, but this doesn't happens if the pistons are facing up.
Linked issues
Attachments
Comments 3
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 just realize that this isn't a bug, is a normal behavior called "quasi-conectivity"