iOS Firebase Crashlytics :: Test crash from simulator appears, but real crash from device doesn't

Question

Situation:

The app (installed via Testflight) crashed on the device. The crash can't be reproduced.

Problem:

The crash information doesn't appear on the firebase crashlytics dashboard, but it did appear in the Apple crash logs, now available through the Xcode Organizer.

The weird stuff:

• forcing a crash (Crashlytics.sharedInstance().crash()) works (in simulator at least) and the crash appears in the dashboard.
• DWARF with dSYM File is configured for all targets, both debug & release.
• archive configuration seems the same as run for all schemas/targets.

Any ideas as to what may be the problem, or what else I could try, will be greatly appreciated. I want to exhaust all the possibilities before we can claim it was just a fluke.
Thanks in advance!

Answer 1

For whoever have the same problem, you have to upload your dSYM on Firebase to avoid missing or incomplete crash information.