Defuser sound.

Gents. Just wanted to check with the group on the following. Bought the car in June last year 2024 core with package. From the onset I would hear the defuser roughly every minute make a sound for about 5 seconds which was noticable. I bought a mod for keeping the valve open. Installed it, then read some info that it's harmful for the engine to keep the center exhaust valve open. So after 2 days I reinstalled the OEM back. Since then the defuser does make the sound but hardly could hear it and for about 1 seconds. Wanted to see if any one has experienced similar issues.