Yeah, I just had this happen to me twice, lol. The picture depicts the first time it happened to me, that rack is supposed to be on the stone slab above it. The second time, it ended up INSIDE a filled cauldron that was directly below it in the kitchen below this floor. Hilarious, but quite inconvenient. XD
Also happened to me. Minecraft PE on iPad, latest version. Updated today. Cannot craft dandelion yellow using dandelions.