Creeper explosion bug

Put the summary of the bug you're having here
What happened was when creepers explode they don't explode any blocks
What I expected to happen was...:
Describe what you thought should happen here
What I expected to happen was for there to be a hole in the ground
What actually happened was...:
Describe what happened here
What happened was no blocks were exploded and there was no hole
Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ...
3. ...