There is a issue where if buid something in the Minecraft sworld will display sometimes a visual glich of a shadows in the blocks Of the honey and slime, but when go to near to the blocks honey with will disappear this visual glich with the shadows.
Steps:
Open minecraft
Click play and select a world
When loaded the world try building something like a tower
You will encounter sometimes this strange visual bug of some shadows in the blocks with honey and slime.
Video and screenshot below: (but doesn't include going to near to the shadow in the blocks of the honey and slime, but will disappear.)
This issue is being tracked at MCPE-117204.