The animations of Campfire, Smoker, Stonecutter, Blastfurnace... don't stop when you press "Esc" to open a Singleplayer menu. The same thing happens with enchanted books, gear, potions or End Crystal.
The particles do stop coming out of the blocks, but the animations won't.

What I expected to happen was...:
All the animations should stop when I pause the Singleplayer by opening the Menu.

What actually happened was...:
The animations won't stop.

Steps to Reproduce:
1. Place a Campfire, Smoker, Stonecutter, Blastfurnace or throw an enchanted item out.
2. Pause the Singleplayer game while having a view of the item/block.
3. You can see the animation still ongoing.