CLLocationManager onClientEventSignificantLocationVisit

In our placation there are instances of crashes that are happening in production. That we cannot quite reproduce. Looking at the crash report doesn't reveal much as the crashed thread doesn't give too much information of where to look for the root cause of the problem. In our app we are also using third-party libraries but I didn't see that they might be the cause for the crash.

If someone can point me in the right direction to look for or how to investigate it. It would much appreciated.