Unreal Freezes when zombies explode

[Sarai]

Before I added health into the mix, zombies exploded just fine but now that it should be doing damage Unreal is freezing.

[Professor Watkins]

In your Zombie BluePrint, you need to make sure that Destroy is the absolutely last node. The DoDamage needs to be between the Spawn Emitter and the Destroy; otherwise, you're trying to get the Blueprint to do work on that Blueprint after it's already destroyed itself.