Hi, I have a category "Product" with many sub-categories. If I use the code: 'show'=> array( 'category' => array( 'Product' )), -- and only have the Product category selected, the MetaBox shows up as it should. But if in the post I select another category or a sub-catagory, the MetaBox is hidden. Please let me know what I'm doing wrong! Thanks!
Now I'm using 'visible' => ['slug:post_category', 'product'], and the metabox still only appears if I have just the single category "Product" selected. If I select any sub-categories or other categories it goes away. I want the metabox to always appear if the "Product" category is selected regardless of any other categories.
Got it, my suggestion syntax is for exactly match when post category should be product and cannot belongs to another one. If you want to show your meta box when post categories is in product and others. You can use in operator: