Nautilus continues to attack when the player is in creative mode

Steps to reproduce:

1. Find the nautilus and hit it once.

2. There's a good chance he'll quickly hit you back, but you'll try to switch to creative mode immediately afterward.

3. After you switch to creative mode, he will make another jump in your direction, trying to damage you.

Observed results:

• The Nautiluses continue to be angry with you and try to damage you.

Expected results:

• Nautilus stops being angry