Improve DataObserver reference holding

I'm trying to use obervable queries to detect when the user is logged in my application in order to start fetching data in background with correct authorization token.

    ...
    userBox.query().build().subscribe().observe(users -> fetchUserData());
    ...
    boxStore.subscribe(User.class).observe(class -> fetchUserData());

First "live" query doesn't work whilst the second works fine whenever I put(user) a new user in the userBox.

Is this correct? I'm not sure from which thread the user is being inserted, might this be an issue?
Does it make sense to use a "live" query to observe the insertion of new objects or is it just for changes in existing objects?
Live queries would be great, for my application and are the main feature that made me pick ObjectBox, hope I can get it working.

Commencez par suivre DataObserver et les chemins d’abonnement de live-query décrits dans le rapport, puis comparez-les avec boxStore.subscribe(User.class). Vérifiez comment les références des requêtes sont conservées et quel thread gère les insertions. Le travail est terminé lorsque la live query observe de manière fiable les utilisateurs nouvellement insérés et que le comportement est clarifié ou couvert par un test approprié.