When you powered a sticky piston with sticky piston above it and holding a block. The block dont stick
MCPE-15354
block dont stick on top of sticky piston when the bottom one is powered and off
Resolved
Works As Intended
0
Normal. Sticky pistons only pull back when they are the piston being deactivated.
From http://minecraft.gamepedia.com/Piston#Usage :
"Sticky pistons only stick to a block when retracting, ..."