Put the summary of the bug you're having here

What I expected to happen was...:
i was going to blow up.

What actually happened was...:
I didn't take any damage and still had full health

Steps to Reproduce:
1. Go to creative and place any amount of TNT.
2. go to survival and place some more TNT. [Any Amount]
3. Place a button and click it. It didn't do any damage to me.