I have experienced something similar when running tracks with deformation on at "an advanced stage", around 30+ laps in. If you notice it crashes more often on tracks with heavy deformation, you need to reset the track in the pits (and give it a minute or two, then exit the track and restart it to make sure it "sticks").
Other than the wierd random error, it has been pretty stable when offline here.
Other than the wierd random error, it has been pretty stable when offline here.