Attached schematic is a small ridiculous machine, but it exhibits a return of the double-state piston (extended and retracted) which halts the piston firing and has to be manually cleared by the player destroying the extended head.
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[media][media]

Screen shot of the behaviour in-game

Duplicate of MC-127 , please use the search function to see if your bug has already been submitted. Currently over 40% of tickets are being closed as duplicate.