Maytag side by side, Flap does not close from ice dispenser to freezer

Good morning to all.

I need help identifying the flap in the freezer door that is not closing up after I get ice via dispenser. The result is ice forming inside and outside the freezer door.

I feel two ridges on the outside of this flap. They may have held a rod or something that went to a white exposed button in front of it. But that button doesn’t turn or anything or have an attachment. :eek:

Yes, I just purchased this refrigerator used.

Maytag
mcd2257heb

http://www.appliancepartspros.com/partsearch/model.aspx?model_id=5167222&diagram_id=28399761#d28399761

Why is it not closing after use? Or opening except via gravity from the ice coming in? What part do I purchase to repair this?