Error filling out the form in the Yandex mobile browser, how to track it?

Question

JavaScript

It is not the first client who complains that when filling out a form on the site and then confirming it, the e-mail form gives an error "not filled".

The problem is that all complainers have a mobile Yandex.Browser, but other people with the same browser do not experience such a problem, and when I try to repeat the error in the same conditions, I also did NOT encounter this, and the problem was not noticed in other browsers either .

The question is, how can you understand what the problem is and catch the error?

Answer 1

Post the form code and attached js