The mistake is that when you put a piston or a sticky piston, and two redstone blocks on it and break the lower redstone block, the piston is somehow miraculously activated, maybe this is something I don't understand.
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Duplicate ofย MC-108 which was later resolved as "Works As Intended".

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.
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