Making a sound after a cycle is done

Brand: Whirlpool
Model Number: Wtw4957pwo
Main Symptom:
What happens & when: As you can see and hear in the video, there is nothing in the washer and it is making that sound. what could it be?

Error Code (if any):
Parts or tests already tried:
Photos / video link: https://photos.app.goo.gl/CeWpbteKpA66ahLi8

It would be recommended to put the unit into service diagnostic mode and see if there are any error codes popping up. Here is a copy of the tech sheet to assist with this.

tech-sheet-w11654507-revA.pdf (318.9 KB)

We don’t have a machine to hook it up to.