I have a product with two product parts inside it. When one of the parts (lets call it part A) is out of stock it updates the product quantity and availability, but when the other part is out of stock (part B) it doesn't. I can't figure out why. It seems like all of the settings for both parts are identical. The only difference is that part B has way more variations than part A. Both are variable parts.
Any ideas what I should look for? I can't figure it out.