[^3D67022F-F268-4B26-8B2D-F2F6B6DB80A4.mov]When sand is on top of sticky pistons and it is unloaded then reloaded, the sand can duplicate if the piston has a 1-tick pulse sent into it. My friend who loves Minecraft just like me found this and I tested it aswell and it is a bug. A suggestion to fix the glitch could be pistons spitting out their blocks like on Java.

From Tom