WORLDEDIT-3543 - Reported by tr7zw

When copy/pasting pistons that are moving in the same tick the Piston and the moved block turn into invisible "Piston moving piece" blocks that normal players cannot get rid of. http://puu.sh/tL4cA/cfd257f6ef.jpg Simple setup to test this. After ~3 //set 0 //undo the Piston and the moved block are gone.

Comment by wizjany

this is an issue with how pistons works in the base game. you can try using //fast mode to bypass block updates but pistons can be weird.

Comment by tr7zw

@wizjany Already using fast mode, the problem is that WorldEdit doesn't save what the "Piston moving piece" tile contains. Worldedit has to save this data (http://minecraft.gamepedia.com/Piston under Piston extension), to stop piston glitching.

Comment by wizjany

if fast mode doesn't work, there's nothing we can do.

worldedit already copies all of that data, the issue is that the piston block changes it upon being set.