I'm seeing very strange behavior when using angularfire2.

The application is calling

1. af.database.list(url) which correctly emits item1, item2, item3
2. After subscription to the observable successfully emits the values mentioned above. A subsequent call to af.database.list(url) emits the following values: [], [item1], [item1, item2], [item1, item2, item3]

The debugging of the firebase_list_factory.js shows that the problem that in the first case "value" occurs after "child_added". In the second case "value" occurs before "child_added" which breaks the observable logic