@Dmitriy @Jamin Help !!
From this morning my projects are still working with Android smartphones but no more with iOS devices.
Infact, working with an iphone, if I logout and then login again I see the data updated but only in that moment then data are frozen and I have to logout and login again to see the new data !! With android devices anything is working correctly. Perhaps the problem is due to the new feature of multiple device. My big issue is that I have many devices already installed and operating around in the country and I cannot to modify the firmware (e.g. auth token).
Could you, please, teach me how to deal with this problem ?