When raising a PR, there’s a “Connect issue” button. The issues it searches seems to be filtered by whatever board you have currently selected in your last ZenHub app view. This was really confusing, as I’d temporarily been looking at another team’s board. It would make more sense to me if the Connect Issue dialog searched all issues, or at least made it obvious where it was looking (and gave me an option to change). Even typing the ticket number didn’t help!