For ALL devices that have recently upgraded to iOS 10, the firebase login is now at extremely slow (10 seconds to 1 minute, sometimes timing-out), and database read operations are also super slow.
As for write operations… users are attempting to save data, which seems to complete with success locally, but then when they return to that same screen at a later point, they find that the data was never saved and is now lost forever.
On iOS 9 and on Android the app is still working fine. This is 100% happening on my devices running iOS 10, as well as all other users who have recently upgraded their iPhones/iPads.
This problem has been constant and the performance has not changed at any point since the iOS 10 update. I just tried to update my iPhone to iOS 10.0.2 and the problem is still present.
Please help! Lots of complaints from users