Able to break a furnace with a hand and then pick up after

When mining a furnace with a hand I was surprised to find that the furnace dropped and I was able to pick it up.imhave done this in a non cheated survival mode. I had crafted all of these furnaces before hand so they are not given to me through the give command with and weird data values.

To replicate this; be in survival, mine a furnace using your hand and it should drop. If it does not drop them I am sorry for wasting your time and their is probably an issue with my iPad or something on my device.

I have a video of this bug and would be happy to give to you however the file limit size is not allowing me to do this