Activate piston when have a block that use repeating command block and activate it , When activate piston it spawn piston headless // i have video that i record the bug here http://www.mediafire.com/file/l3s650q8kqgdlz2/Piston+Headless+BUG.avi
MC-116315
Spawn piston headless when using /setblock command when pistone activate
Resolved
Invalid
0
Piston base and head are 2 different blocks.
You used commands to remove the head, getting the base in an invalid state, but you did not update the piston, as such it remains.
This is invalid as it requires commands to get this block in an invalid state (which can also just be /setblock-ed).