Android : Android: Crashlytics not sending report c++ library crash

I have an Android app which has a C++ library (via JNI).

Whenever the library crashes, it makes the app also crash, but I don't receive the crash on crashlytics.

Is this a limitation of Crashlytics. Does it only catches the uncaught Java exceptions?

Note: Any Java exception on main thread that makes the app crash is caught by Crashlytics, so I know it is working.