I've been experiencing an issue that has causing me a lot of problems, as various apps including Whatsapp, Telegram, Linkedin, Authy, Lastpass, and more will randomly log out, and reset back to their inital state as if I just installed it on a clean phone. Apps like Whatsapp and Telegram will have lost all of their chat history, even if it was backup up on iCloud.

I've talked with Apple and they're adamant the problem is not with the hardware or with iOS after restoring the phone using iTunes. Whatsapp support is just giving me the run around with canned responses, so I doubt they know anything about the problem either.

I'm at a total loss as to what might be causing this problem after restoring the phone multiple times (the last time without restoring to a backup).

My phone is an iPhone 6S 64GB running iOS 9.3.2 although this problem has existed well before iOS 9.3.2 was released.

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    @freshking try resetting your network settings. So far, it's solved my problems. – ecnepsnai May 28 '16 at 17:12
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    Unfortunately this did not work for me. After a while it started happening again. – freshking Jun 5 '16 at 22:02
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    I am experiencing this on my iOS10 as well. And I am developer too. Anybody has any update on this? Any fix? So annoying to keep on logging on esp on Whatsapp cause u gotta key in and click many buttons before logging in. – GeneCode Nov 8 '16 at 2:09
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    I'm experiencing this with my iOS 9.3.2, iphone6. I'm also an iOS developer, still using Xcode 7.3. Apps I've noticed logging out: Facebook, Whatsapp, Messenger, Instagram, Slack, Myfitnesspal, Adventure Capitalist, Apps that are still working: Inbox, Linkedin, Trello, Twitter, Dropbox, Clash of Clans. Basically I hate my life atm. – Esqarrouth Nov 16 '16 at 6:44
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    Hi, i have the same Problems. i know all the NSUserDefaults get reset. I have found out that it always happens when the device is connected with iTunes on my 2 different Macs. My first guess was that it is at the backup. I had iCloud backup switch off but iTunes tries it and thereby destroys the settings. I bought icloud again and the backup started. Since then the problem has been less. For a week it is back again, despite a working backup. – Jeanette Müller Feb 9 '17 at 10:02

A found a 'satisfactory' workaround. As I commented on the question, I was having the bug after I decided to close all applications using the app switcher and then start every application on my phone.

My 'solution' is to close all applications in the app switcher and then turn off the device. Then, turn on the phone.

Since that, I have not had problems.

protected by Community Oct 22 '16 at 9:03

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