Interrapt G34

Environment
test
https://qainterrapt.brainster.xyz/login

Browser:
1.PC / Windows 10 V. 22H2 / Google Chrome Version 131.0.0.0 (Official Build) (64-bit)
2.Apple iPhone 11 / iOS Version 17.6.1 / Safari Version 17.6 on iOS 17.6 (Official Build) (24-bit)

Description
By entering a phone number more then 15 characters a new attendee is created.

Pre-conditions
User must be navigated to Interrapt application
User must be logged in as admin.

Steps to reproduce
1.Click on "ATTENDEES" menu.
2. Click on 'CREATE' button from the top right corner
3.Fill the 'Name' field with valid data.
4.Fill the 'Surname' field with valid data.
5.Fill the 'Email' field with valid data.
6.Fill the 'Phone' field with invalid data.
7.Fill the 'City' field with valid data.
8.Fill in the 'High school' field with valid data.
9.Fill the 'Faculty' field with valid data.
10.Click on the drop-down field labeled "Webinar."
11.Select a webinar from the available list.
12. Click on the 'CREATE' button in the bottom right corner..

Expected Result
When a user enters a phone number with more than 15 characters (e.g., "12322547895447786") in the phone field and attempts to submit the form, the system should display a message 'enter valid number'.

Actual Result
The system accepts the input without displaying any validation error, allowing the invalid phone number to be saved.