Lodestone compasses cannot be disenchanted in a grindstone

The bug

Compasses attached to a lodestone have an enchantment glint, suggesting that they could be disenchanted. However, they cannot be turned back into a normal compass by using a grindstone.

To reproduce

1. Get a lodestone compass
2. Place a grindstone
3. Try to put the lodestone compass into the grindstone GUI
   → That doesn't work