Sharpness, Bane of Arthropods and Smite enchantments don't work

Steps to Reproduce:

1. Enchant 3 diamond swords with these enchantments and have one without any;
2. Spawn a mob and hit it with one of the swords, and then count the number of punches until it dies;
3. Repeat the process with all the other swords.

Expected Results:
The enchanted swords should require less punches based on which mobs you hit.

Observed Results:
Every sword deals the same amount of damage no matter what mob you hit.

Screenshots/Videos attached: No

Notes: After testing in 1.14.30, I can say that this is a new bug that is currently only occuring on the beta.