It has occurred exactly when the car hits a specific material after the kerb, maybe the bottom of the car hits that surface with some wrong collision properties. Of course it won't happen with Clio, all in all its chassis it's a 20 cm clear from the track.
Tyre smoking from huge understeer as well, something must be wrong with the physics made by the mod maker too.
It seems to me like this mod might have the collision model lower than the undertray points. This can result in some weird collisions. It *might* simply require a slight increase in graphical height to resolve. I.e. upping the 2nd value here, GraphicalOffset=(#, #, #) Alternatively the Undertray##= points may need tweaking.
Looks definitely like the mod. I did 80 laps with the Marussia last night, and ran wide there and everywhere a few times, and not once did that happen.