This Sticky Pistion Pushing Bug will not affect the wooden plank but it's kinda Annoying and Dumb cause every time the Sticky Piston pushes the wooden plank it will turn to Dark Oak Planks when it pushes and comes back turning back into Oak Wooden planks! It's weird like I don't know why that happens it's probably cause the 0.15 version is still being Introduced to #MCPE It is very new I hope 0.16 is better to so enough of that content I hope you developers of MCPE are Reading this & will fix this bug and hope you guys have a great Morning/Afternoon/Evening/Night Good Night for me! It will soon be morning (This was posted on July 15th 2016 0.15.0 at Times 10:49PM) :/ Lol