gravity-block issues
MCPE-40404Concrete Powder Breaks When Falling
Fixed
MC-143508Some gravity affected blocks can fall through extending and retracting pistons
Confirmed
MC-173002Falling blocks that are removed before they can remove the block that spawned them create ghost air blocks
Duplicate
MC-179573Ghost rail is created when pushing a rail on top of a gravity block which starts falling
Low
MC-184548Falling blocks going through cobweb don't reach the ground
Duplicate
MC-184549Fallling blocks visually jump up when falling through cobweb
Fixed
MC-207133Some gravity blocks are destroyed & dropped as an item when attempting to occupy the same space as another gravity block
Confirmed
MC-213683Z-fighting occurs when blocks with gravity fall through powder snow
Duplicate
MCPE-120364Can push many gravity-affected-blocks with a piston when stacked together as described.
Incomplete
MCPE-183543Gravity blocks bob up and and down on big dripleaves powered by redstone
Confirmed