I am aware of at least one fairly prominent agent who purported to be unaware of whatever section it is that entitles them to the commission once a contract reaches a certain stage of maturity even if the deal never closes (can’t remember what the milestones are anymore). Not sure if she was actually unaware or playing dumb. It may be the broker, not your agent, who’s decided to try to enforce that section. In any event, we modified that same section before we signed it to avoid just what you’re dealing with now. I’d get a good lawyer.