ScriptRunner Behaviours: cannot pre-fill field Email in Support Contact Form

Question

With same code I can set a field Description, but cannot set a field Email. See the code below. The result: the content of field Description is filled with email address, but field Email stays empty. The name of field Email is correct. Why the behavior is different? How I can set a content of field Email?

import com.atlassian.jira.component.ComponentAccessor
import com.onresolve.jira.groovy.user.FieldBehaviours
import groovy.transform.BaseScript
@BaseScript FieldBehaviours fieldBehaviours

def currentUser = ComponentAccessor.getJiraAuthenticationContext().getLoggedInUser()
getFieldById("description").setFormValue(currentUser.emailAddress)
getFieldById("email").setFormValue(currentUser.emailAddress)

Alex Programmer · Accepted Answer

Another function: getFieldByName("Email") gives a result, so I have a solution. Why getFieldById("email") doesn't function, is still unclear.