Mod Version: 1.0.0
Forge Version: 14.23.5.2838
This issue occurs on the lastest version of Forge? (Y/N): yes
Crash Log (Post to Pastebin/Other Text hosting): not applicable

What happens:
When a mob dies on a trap, the trap retracts visually but the noise from retracting repeats for at least seconds.
Sometime just passing the cursor over the trap will stop the noise, sometime it won't stop until another entity hits the trap.
Issue is not reproduced when the entity exits from the trap before dying.
This was observed in single player. It may or may not happen in multiplayer.