Edit: Confirmed bug, Not parity issue!

Red and brown mushrooms can not be bonemealed on dirt or any dirt related block in the nether to generate giant red and brown mushrooms. It just uses all your bonemeal and prevents the player from being able to have an easier way of obtaining mushroom stew in the nether. The feature works on java but not bedrock. I feel like its a bug since it is not working as intended and consumes bonemeal.