Managed C# code crashes
In order for Bugsee to be able receive unhandled exceptions from managed C# code, the Script Call Optimization must be set to Slow and Safe. Otherwise unhandled exceptions will result in app crashes with no useful information.
The setting can be found in Player Settings -> Other Settings -> Optimization:
Information about filenames and line numbers is available only when Script Debugging is enabled as well:
Unity does not by default enables dSYM creation for its builds. Bugsee does not modify the build to enable it, it has to be done manually on the resulting XCode project. It will not work, however, if Script Debugging is enabled, dSYM generation fails in this case.
See iOS crash reporting instructions for information on setting dSYM auto uploading.