well as long as the snake is hiding i don't really think its odd.

They will thermoregulate as needed. Your house might be a bit cooler now that it is winter and the snake might just be a little chilly and want to stay on the hot side. This is why you provide and hot and a cool side so the snake can choose between the two.

She might not understand that the humid hide is a hide. You could try directing her into it and see if she starts using it properly then.