How long exactly has it been since she shed and how much time is she spending in the humid hide? The only time my corns have ever had problems were when they spent too much time in a humid hide (namely my girl using her lay box too much). They are not tropical snakes and a little bit of humidity isn't bad but too much can cause issues. The dark patches almost look like scale rot beginning which would also be from her being in too much moisture. I'd need to see closer pictures to tell for sure though. Do the scales look like they are 'imperfect' or warping?