Minecraft wiki entry for Development_versions, associated text: Glow lichen does not generate hanging in the air inside strongholds anymore. (MCPE-123448)
Glow lichen now correctly checks for the face of the block they are attached to be full.
Glow Lichen can now be attached to leaves.
Blocks such as glow lichen, torches, and redstone can no longer be placed on or attached to brewing stands.
Blocks such as glow lichen, torches, and redstone can now be placed on or attached to trapdoors, depending on their state.
Azaleas and lily pads are now broken by flowing water. (MCPE-152040)