Meh, it'll revolt in a few days, and it'll love D'Hara again by the end of the week.
That's just how Port Nebel rolls. I guess I'll just have to do more routine sympathy checks on our cities, though, 'cause either there was a bug, either there's a random mechanic that gives random boosts in sympathy at times, or either someone intentionally increased it. Regardless, nothing I can't handle. Each city only borders 1 foreign realm, and that char has been a priest/ambassador for years.