Hoody mockup drawstring doesn't change color

I’m creating mockups for hoodies and the drawstring doesn’t change color with the rest of the hoody. This is the same for all mockups. I’m using printful and their most popular hoody is Unisex Premium Hoodie | Cotton Heritage M2580. The drawstring on printful changes color.

I would be grateful if this feature to change/match drawstring color to hoody could be added