Usually, it takes more than a day for humidity changes to affect cigars. Sometimes it takes weeks. It depends on the cigars and the magnitude of the changes.
Overall cigars are pretty resilient — think about it: they could spend weeks or more sitting in (hot or cold) containers while being shipped and processed through Customs.
If you have not already done so, I would re-season the problem humidor (or all your humidors). As humidors dry out, the joints loosen up and the could become leaky. Seasoning causes the joints to tighten up. Don’t be stingy, season it thoroughly, until the empty humidor holds a steady RH for at least 24 hours; preferably 48 hours.
Just my
