Number format (phone) doesn't work properly

I noticed a bug related to the phone number field validation and wanted to share it in case it is helpful.

Right now, users can enter letters into the phone number field and still submit the form, which does not seem correct.

Then, if a condition is added requiring the field to be numeric, the behavior flips the other way: even when a valid phone number is entered, the form shows an error and cannot be submitted.

So at the moment, the field seems to fail in both directions:

it allows clearly invalid inputbut it also rejects valid input when numeric validation is enabled.