Outlook for Mac contacts issue - New Outlook Switch

Has anyone experienced any duplication issues with Mac contacts in Outlook when the new outlook slider is moved across in Outlook to give the new view?

Contacts in the old Outlook view and in OWA are not duplicated and the correct information is populated. Once the slider is moved to the new Outlook view though I notice things like address information missing from a contact or that the contact has been duplicated a number of times. 

I'm just wondering if this new view is still in beta which maybe explains my issues or if it's not how to go about resolving this issue. This email account is in Office 365.

Thanks,

Scott