Conditional Display: Double-check the conditions for displaying custom fields. Ensure they meet your criteria.
Field Placement: Verify that the custom field is placed within the correct section (billing, shipping, additional) on the settings page.
Field Order Not Changing: Clear all caches and refresh the checkout page. In rare cases, a server-side cache or browser cache might be causing issues.
Validation Errors: Review the validation rules you’ve set for your custom fields. Ensure the rules are clear and don’t cause unnecessary errors for customers.