I'm using FCM service provided by firebase to send push notifications to clients.
But I'm facing a trouble.
I transferred my app to a certain company and made a certificate, which type is "Apple Push Services", recreated using a new CSR of that company.
And I created new .cer file and .p12 file on developer console "Certificates, Identifiers & Profiles".
Then I uploaded the .p12 file onto firebase.
After those settings, I faced the problem; any notifications to ios client don't reach all clients.
Testing by a few iPhones, I found that push notifications got to reach normally after reinstalling the app from app store.
I've never heard reinstalling the app to get notifications, so that I think I might be making some mistakes.
Any hints to solve this problem or anyone has experienced this problem?
