[T.G]

I think I know exactly what flavor you are talking about, but I've only experienced it with some very old tubed Zino golds that I had, they had sat in their vented tube with cedar wrap for so long before smoking, they literally taste the way a cedar plank smells when you grill with it. Dry cedar, wood, slightly floral and a hint of tobacco.

Not sure I have a definite answer for you though, besides a lower humidity to slow down the aroma release a bit. Oh, and smoke more.

You could add an open box of baking soda to the humidor, or some activated charcoal to absorb some odors.