Gravity Form not submitting if CC field is left empty

No matter which plug-in I used to accept credit card payments on a Gravity Form (Including Gravity Forms Stripe add-on), if I leave the CC field empty the form will not submit. Only if I populate the CC field the form then submits.
The field is not required, still the Gravity Form does not submit ajax mode or not ajax mode made no difference.

You’ll need to configure conditional logic on the card field and the payment add-on feed, so they aren’t used to process the submission when payment isn’t being made.

Thank you, it works.