Why is there an empty transaction in Bitrix24 after filling out the form without a contact?

Question

Bitrix24

Essence:
The site has a form with many required fields, built on Bitrix24. The form, when completed and submitted, creates a deal and a contact.

In 1% of cases, empty applications come from it. When this happens, a deal is created in crm - which only shows the time. The contact is not created.