Put the summary of the bug you're having here
What I expected to happen was...:
I expected nothing to happen
What actually happened was...:
Piston extended
Steps to Reproduce:
1. Put a piston to extend vertically.
2. Put earth on piston
3. Put redstoneblock on earth (see pic1)
4. Remove earth and the piston gets extended (see pic2)
Same problem if putting the redstone first without earth into the air and put the piston next with getting no contact. (Pic3 and Pic4)
Works only with both types of pistons not with other redstone components like redstonelamps
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Thank you for your report!
We're actually already tracking this issue in MC-108, so I resolved and linked this ticket as a duplicate.
However, that ticket has already been resolved. That means that this is not considered a bug and won't be fixed. Please do not leave a comment on the linked ticket.
If you haven't already, you might like to make use of the search feature in the future to see if the issue has already been reported.
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