Smelting animation does not display while sleeping

While testing out the latest snapshot, I noticed something for the first time

I crafted a bed and a furnace.

The feet of my bed points toward the front of the furnace.

As it was getting to be nighttime, I had some iron to smelt and wanted to reset the time to day.

So I put my iron ore and a piece of coal in the furnace and hopped into bed.

I observed that the smelting animation does not appear on the screen if I am in bed waiting for the time to become day again.