Auto sync of Crowd users in FeCru doesn't reflect update of email changes in JIRA/Crowd

When I change the email address in JIRA/Crowd of a user, that user's email address isn't updated in FeCru.

1. Change email address in JIRA/Crowd.
2. Let the auto sync happen (I set mine to 5 minutes)
3. Email address change isn't reflected.
4. Add a user to JIRA/Crowd
5. Sync the user is added to FeCru
6. Manual sync users in FeCru
7. The user email address change is now reflected in FeCur