Had a customer last year with a similar drip issue, but theirs turned out to be condensation forming because the bathroom exhaust fan vented directly into the attic space—not outside. Have you checked where your bath or kitchen fans vent to?
Yeah, had that happen to me too—thought the roof was leaking, turns out previous owner vented the bathroom fan straight into the attic. Instant DIY sauna up there...not the spa experience I was hoping for. Definitely worth checking out.
Had a similar issue here, except mine was the kitchen exhaust fan. Previous owner decided it was fine to just let it vent into the attic insulation...because who doesn't love greasy insulation pancakes? Ended up having to redo the whole venting setup properly. Curious, did you notice any mold or moisture damage up there, or did you catch it early enough?