Phone number field not working correctly

I can't add clients' phone numbers using basic country codes.

A phone number formatted like this: +44123456789 doesn't work.
Is that a bug or is it designed this way?
Seems like a pretty big oversight

Hello Daniel,
Kindly let us know from where you are adding the phone number like from a checkout page or while manually creating a customer/invoice or in the client portal.

When adding clients manually in the customers section

Hello Daniel,
We have added the validation.
Kindly check once again and try to add the phone number in the fields.

it is working now! thanks for the fix!