I'm not with Laminar Research, just a fellow simmer in the UK.
I think you'll find that the cockpit going dark and then light again is quite normal, it's just the aircrafts location and position in relation to the sun and/or clouds, where areas of the cockpit are covered in shadow.
Mine does exactly the same thing and whilst it seems a bit exaggerated at times, it appears to be quite normal.
For that reason, I always have my instrument panel lights permanently switched on, even in daylight conditions.
Hope this helps?