Sorry to say but it is not a bug or issue at the Theme end.

Im sorry to say too, but when an element is not have a setting to change or edit is a bug, especially when you tell me that can be changed by the primary color setting and this is not happen!

i have checked to change the primary color and i have already done that because im use a total different color scheme on my website, the only element that is not changed is the background of cart icon. Please check the video on private content i create