Missing crash reports

We can see from App Store Connect under TestFlight tab on the overview that our build got X number of crashes.

Problem is that these crashes are not found in Crash feedback tab or not from Xcode Organizer.

This problem has been ongoing for us in multiple different app builds now.

Is there any suggestions what might cause this problem and how to start solving this? I'm pretty confident that these crashes happen in our network extension (NEPacketTunnelProvider).

Note - We have a lot of TestFlight users and to start asking them all separately manual logs from phone might not help us here. (Settings > Privacy > Analytics & Improvements > Analytics Data).

Also these crashes have not been reported to us by the users. I suspect that the reason is that the extension kicks automatically back up since we are running VPN there with on demand rules. Meaning that the users might not be able to notice the service crash or shut down because of the automatic restart.

Thanks

Missing crash reports
 
 
Q