because you need Silk Touch tools to get a grass block and breaking a grass block without said tools gives you dirt.... works pretty well As Intended
where you catch fire, place block. fire will become visible again. punch fire out or place block. It is a real PITA bug and game lagging bug if you get enough hidden fires going in a spot. Happens in the nether when exploding beds also.
campfire, nest and break the block above the nest if there is one so the smoke goes through. don't leave a space between fire and nest