at last, I want to save all the meta boxes for the custom post type “product”, that should include “product_slogan” and “product_facts”, and their contents – I added a hidden nonce input as well, and this is the code I used to save custom meta boxes / fields:
my problem is that meta boxes like “product_slogan” that contain only one custom field (“product_slogan” itself) get saved or updated when I save the post, while meta boxes that contain multiple custom fields like “product_facts” do not get saved/updated. I have the same issues with other custom post types or meta boxes in the same page. I think I’m doing something wrong with meta boxes containing multiple fields. How do I solve this?