I have the same problem here, I tested it on 2 different sites, in the frontend the field does not show the country flags after enabling International Telephone Input in Edit Field > Other options.

Even without knowing the reason for the problem, I did a test, when sending the form, even filling in a phone number ex: 5544999990000, the value is replaced by an image url on my own site, very strange.

Hi, thanks for your report. Could u pls send a ticket to our email: 'support@piotnet.com'?

We need to access your editor to check relevant elements.

On all the sites I put it doesn't work, so it's general, this problem appeared in the change to 7.0

not work