relates to:
https://mojang.atlassian.net/browse/MC-1677
https://mojang.atlassian.net/browse/MC-5726
if a block is placed on the face of a horizontal, fast firing piston during a small window where the piston is retracted (aim for bottom edge), the block can be duplicated.
(not seeing any open copies of this bug, it seems to be a repeat offender though)
- duplicates
-
MC-631 Duplicating/deleting blocks
- Resolved