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  • Hi @studio34

    I don’t believe this underscore is an issue at all. There is no code in ACF which is exploding the $post_id string by the ‘_’ cahracter. Instead it looks in the wp_options table for a value with a options_name of:

    'product_cat_' . $cat_id . '_' . $field_name

    Perhaps you are having another issue but have jumped to this conclusion?

    Let me know if I can be of any other help.

    Perhaps you could test on another taxonomy just to rule this out?