Access Violation on Application.LoadLevel

We’re experiencing random crashes when loading scenes in our game on WP8 similar to:
http://answers.unity3d.com/questions/658410/access-violation-on-applicationloadlevel.html .
Setting debugger to ‘native’ type has not helped produce any usable logs.
The test device is a Lumia 920.
The crash happens on scene startup, while the previous scene is still shown but, apparently, the scripts from the new scene make it atleast as far as the first LateUpdate loop.
Our scenes are loaded asynchronously, using a home-made intermediate loading screen.

Do anyone know how to fix this issue?

Do you have a callstack?