When minecraft is launched and a world opened in any of the current 1.12 snapshots the recipe book with Oak Wood appears to be glitched. I have tried all ways to put Oak wood into my inventory and for it to pick it up. I have taken it out of all containers in the game, mined it, and gotten some from Creative Mode. However, when I put a piece of Dark Oak wood in my inventory, it found it and said 'New Recipe Unlocked". When I checked the recipe book it showed the recipe for Dark Oak Planks