Problem with JEMH and script runner listener

[Tomasz Bryła]

Hi i have a listener in Groovy. It's check a value of labels and if labels value is not 'form_email', then script set a predefined value of another custom field. The problem is when I create issue by email. JEMH set labels value on 'from_email', but script still set value of custom field. I don't know where is a problem. Here is my code. 

import com.atlassian.jira.component.ComponentAccessor
import com.atlassian.jira.event.issue.IssueEvent
import com.atlassian.jira.issue.Issue
import com.atlassian.jira.issue.label.LabelManager
import com.atlassian.jira.issue.util.IssueChangeHolder;
import com.atlassian.jira.issue.util.DefaultIssueChangeHolder
import com.atlassian.jira.issue.ModifiedValue


def issue = event.getIssue()
def projName = issue.projectObject.name
def label = issue.labels
def labelMgr = ComponentAccessor.getComponent(LabelManager)
def containsLabel = "from_email" in issue.getLabels()*.label
def CFM = ComponentAccessor.getCustomFieldManager()
def crmContacts = CFM.getCustomFieldObjectByName("CRM Contacts")

if (!containsLabel)
{
 switch (projName){
case 'PROJ1':
 Issue myIssue = event.getIssue()

def changeHolder = new DefaultIssueChangeHolder();

crmContacts.updateValue(null, myIssue, new ModifiedValue(myIssue.getCustomFieldValue(crmContacts), '(356,)'), changeHolder);

myIssue.store()
break;
case 'PROJ2':
 Issue myIssue = event.getIssue()

def changeHolder = new DefaultIssueChangeHolder();

crmContacts.updateValue(null, myIssue, new ModifiedValue(myIssue.getCustomFieldValue(crmContacts), '(10)'), changeHolder);

myIssue.store()
break;

}
}