Based on your additional facts, there is nothing wrong here.
The items reflected in box 20 represent wages (and other required items for Section 199A) paid by the partnership and has nothing to do with whether or not you receive any guaranteed payments.
Had you received guaranteed payments, then something would have been reflected in box14.
The K-1 appears to be correct based on your facts.
*A reminder that posts in a forum such as this do not constitute tax advice.
Also keep in mind the date of replies, as tax law changes.
