Zimbra Desktop on Mac v 7.2.1 GA (build 11637)

I have two Zimbra email accounts and with it of course are two Address Books, two Calendars, etc... As I work during the day and go back and forth between email, address book and calendar; periodically when I go back to contacts, Zimbra seems to lose focus and show no contacts and I have to click on the correct "Contacts" where I store all of my contacts. Not sure if this is because I have two Zimbra accounts configured and no one discovered it yet? Or because it's the second Zimbra account in the order. I have not tried just installing one zimbra email account to see what happens as I work. Happening to anyone else?