Also I see really suspicious DEBUG message:
Log Details
#2.0#2016-06-02 09:06:37 AM#DEBUG####Push#1464869197071000#26db48a3-6428-4f00-a4a3-d17966f0a85d##com.sap.mobile.platform.server.notifications.async.impl.DispatchRunnable:run########4307#####Push dispatcher com.sap.mobile.platform.server.notifications.async.impl.PushMessagesCallable@4e9359d6 will next run for tenant ec18b29b-748a-4211-9110-1ab39471b5a3 after 600000ms#
To my understanding tenant is registration ID. But this registration ID does not exist anymore !
Is that sth. like caching problem or what ?