Steps to reproduce:
1. Play Naga Rogue.
2. Have the opponent play a creature with both power and toughness less than 4.
3. Grant Naga Rogue trample. (Ex: Overrun)
4. Attack with Naga Rogue.
5. Have the opponent block with the creature.
6. Attack again with Naga Rogue and do not block it.

Actual results: Naga Rogue's ability triggers, it visually heals the opponent then deals the actual damage to the opponent. The overall damage dealt to the opponent is correct.
Expected results: Naga Rogue damages the opponent.