I am puzzled. Our application internet requests (either our own API or other services like Crashlytics, ...) fail when the application executes on Cellular connection only. This happens only on iOS13, previous IOS versions are working on all our devices, and only happens when running on Cellular only. When WiFi is on, all works as expected.
The error, on Crashlytics, can be seen below. We are getting the same error on all APIs as well.
NSLocalizedDescription=The Internet connection appears to be offline., NSErrorFailingURLKey=https://e.crashlytics.com/spi/v2/events, NSUnderlyingError=0x28319bc60 {Error Domain=kCFErrorDomainCFNetwork Code=-1009 "(null)" UserInfo={NSURLErrorNetworkUnavailableReasonKey=1, _kCFStreamErrorCodeKey=50, _kCFStreamErrorDomainKey=1}}, _kCFStreamErrorCodeKey=50}
