There's lots of problems with push in general in iOS 11.0n. I have two apps, one uses silent pushes and I can reproduce problems with the pushes not being delivered. Theres nothing I can do to fix it, its an Apple issue, they have changed the behavior of silent pushes and also introduced a bug with iOS 11.0.
However I also have another app which uses VoIP push. WhatsApp uses VoIP push and their users have been experiencing lots of notification issues with iOS 11.0n too: https://whatsappen.com/news/5465/many-complaints-whatsapp-notifications-ios-11-update-solution
That link above (and WhatsApp web site states something sililar)
It’s indeed an iOS 11 bug. It is affecting users who habitually force close their app.
I'm unable to reproduce any similar issue with my app which uses VoIP push (tried force quitting it several times). And that's my problem - the fact that I can't reproduce it. Just because I can't reproduce it doesn't mean it doesn't affect my app.
If there is a problem with VoIP push and therefore potentially with my app's behavior I would like to reproduce it, and fix it. WhatsApp claim they fixed their issue without waiting for a new release from Apple, so it must be something they can work around.
I would like to know if anybody knows what this VoIP push problem is with WhatsApp and what they did to fix it.
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