Numbing means the blood circulation is being cut off. Numbing is not something that typically goes away after you 'adapt' to it. Usually numbing gets worse if nothing is changed, or eventually the numb area does not get un-numb afterwards. That's nerve damage. Men have this problem with some saddles too, and in the worst cases it can make their genitals numb to the point where they can't even achieve normal erections anymore.

Interestingly, a thinner chamois pad might help- it will remove a layer that's pressing back against your soft tissues. Give it a try at least.