I have an issue on an Android client app. After I call takeOff and configure nameUserId and userNotificationsEnabled, everything is ok, the push notifications work. Later on I need to configure another user id (logout for example and login immediately with another user but in the same app session, without restarting it) and push notifs stop working. What I do to disassociate the old user is to set userId to null, and then to the new value. And this way the push notifs stop working. Is there something that I am missing?