No TNT explode-sound when there is a lot of mob noise.

When you ignite TNT and there is a lot of mob noise you will hear no TNT explode-sound.

Steps to Reproduce:

1. Make a box of bedrock/obsidian and place tnt in it.
2. Spawn a lot of sheep inside the box.
3. ignite the tnt and close the box (with bedrock).
4. No tnt-explode sound