Phone Field Allows Submission with Only Country Code (no phone number)

Hello. We’re using your plugin with the “Flag without dial code” options since we need to have the country code submitted with our entries and the instructions tell us to “Choose Flag without dial code for getting country/dial code in notification/entries.”

This appears to work well and shows a “+1” in the phone field for a U.S. geolocated user. The form field will also show a real-time “Invalid number” message when the field is active and a user doesn’t enter a correct phone number.

HOWEVER, the user CAN successfully submit the form with just the country code (only “+1” for example) in the phone field — where they haven’t entered a phone number at all.

Is there a way to fix this issue?

Thanks for your great plugin work & for any assistance that you can provide.