Crafting issue with Mangrove Planks

So I was just randomly experimenting with crafting when I put a stack Mangrove Planks down in Creative Mode. I tried to take the button that was crafted out of them, but glitches whenever I do it. I cannot take them out, even with the /clear command, nor can I add any other item. I tried going in Survival, still the same. Oh, and this is the 2×2 crafting grid and not the 3×3 crafting grid.