Condensation Inside Hood Vent

This morning, I noticed some liquid on the cooktop, which looked like a little pooled oil. I go to wipe it down and notice it’s actually water. I felt around the bottom perimeter of the hood and, sure enough, there’s a drop of water developing. Once I pulled off the covers/trap (which had an ounce or two of water in it, I could see there were condensation droplets up at the top interior of the hood.

We did not cook on the stovetop yesterday or this morning, so it wasn’t a result of warm air from the cooktop being pulled onto the cold inner surface of the hood.

I went up into the attic and checked the 8” duct, which is wrapped with insulation. No dampness on the exterior, and none collected near the penetration through the drywall ceiling. There was also no condensation on the uninsulated duct inside the cabinet above the hood.

My suspicion is that either all the wind yesterday was somehow causing the damper to stay open so much that humid air was being forced down the duct, or that there’s a mechanical issue with the damper, keeping it open and ending in the same result.

Y’all have any other ideas?