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When you view Mautic’s contact database, it is automatically set as static, meaning you will not see new contacts being added unless you refresh your page or navigate away from it and return. 

Turn on Live Mode

By clicking the thunderbolt in the top right-hand corner, however, you can enable live mode, whereby contacts are automatically added to the top of the contacts list you are viewing as they are created, without you needing to refresh the page. Live Mode Contacts If you want to toggle back to static mode, simply press the thunderbolt button again.