What condition does a POMatched Invoice close the corresponding PO on?

Summary:

I've found out tthat some POmatched Invoices close the assigned POs after assigning receipts to the invoice, but some others.|

I was wondering what condition a POMatched invoice close the assigned PO on.

Content (required):

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):