Realm Cloud Full Sync Tutorial - Sync is not working



I am currently trying out Realm Cloud and Realm Sync. I completed both iOS tutorials for Query Based and Full synchronisation techniques.

While I did not have any trouble getting the Query Based tutorial to work, the Full synchronisation simply does not work for me. I log in with my test user on two separate devices. Both with fullSynchronisation set to true. But if I update the Realm DB on one device the changes are not reflected on the other device. Is there something I completely miss out here ?

Any help would be appreciated