Leads are not converting with Normal window and converting with Incognito window (Chrome)

We have created a Form Submission Event. When Leads are filled through a form from a normal Window Browser(Chrome) and it is not converting. But this is working with the Incognito window (Chrome).

Example: We have filled the form and submitted by providing email ID - Normal Browser (Chrome - Non Private Window). This email is not showing in Visitor Profile. We have filled the from through Incognito Window (Chrome - Private Window). This Email is showing in Visitor Profile.