Madewell black slip on mules stacked heel size 9 Flaws

Madewell style H-6687 black leather mules, size 9 Soft black leather uppers with adjustable buckle strap. Strap can be swung back to the heel. Leather insole. Approx 3.5” stacked block heel. Synthetic outsole. No visible marks on the outer side of the black leather. Soles in great condition. Flaw: inner sole is separating from the vamp where the foot slides in & on one of the straps. Discoloration on the inner side at the same area from ?? None of these flaws are visible when wearing shoe. Suspect it could be glued back together. 3WSh1-13Bi