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Support › General › ✅My custom metabox stops working on WP 4.9.8 › Reply To: My custom metabox stops working on WP 4.9.8
Hi,
Can you show your code? The function format_single_value doesn't have any relation to multiple. Maybe it comes from the format_clone_value from inc/field.php file, where it checks if the field has multiple values.
format_single_value
multiple
format_clone_value
inc/field.php