If you put an anvil on a piece of TNT and blow up the TNT nothing around the anvil is affected and the anvil is unchanged, You don't even lose health.

Put the summary of the bug you're having here

What I expected to happen was...:
The anvil and everything around it would be destroyed.

What actually happened was...:
Nothing happened
Steps to Reproduce:
1. Place TNT.
2. Place Anvil on TNT
3. Set of TNT.