Efficiency Isn't Working for Diamond Shovels

Put the summary of the bug you're having here

What I expected to happen was...:
Dig Dirt Super fast

What actually happened was...:
Dirt was mined slow and as if Efficiency wasn't on it.

Steps to Reproduce:
1. Revert back to 14w31a Enchant Diamond shovel with Efficiency dig dirt.
2. Go to 14w32a/b open that world and dig dirt.
3. ...