Loot bounce is triggered when multiple people in crate

Here is what I am seeing:
Player 1 opens box
Player 2 also opens box 
Player 1 loots all items while both are viewing the box
When last item is removed from the crate/box, Loot Bouncer is triggered on Player 2 and they get slapped. 

Is there a way to keep this from happening?

No, that's normal...
All but the last looter gets slapped