I had this happen on a revenue flight where Sunwing was significantly delayed. As the SE, I called the Concierge on behalf of my colleagues who were going to misconnect.

Had to pay a change fee to get them on a later AC flight.

Not sure how they would treat an AE ticket, but if you are gong to misconnect, I'd suggest calling ahead rather than just showing up at the AC counter saying "oops it was Sunwing's fault".