Bundle availability does not take in account individual products availability

When a product from the bundle is not in stock the bundled product is still displayed as available and the “Add to basket” button is enabled. Only when trying to add the bundle to basket an error message is displayed that some of the products are not available.

This behavior impairs the external integrations, for example Facebook product feed, that lists the bundle as in stock, when it cannot be actually purchased, thus wasting money on ads, etc.