Hi Vilas
I accept your point but my view would be that the sim itself is not intrinsically wrong. It behaves exactly as some of our aircraft will in this situation and this is described (albeit well hidden) in the FCOM.
We are lucky that we have another (older) sim which reflects the other potential outcome.
I understand your scepticism about this, especially law changes with config but that is what the FCOM says and it is what the sim does.
The techno geek in me would love to know the exact mod details that drive this behaviour but the trainer in me just tells me to deal with it on the day - with the understanding and acceptance that different msn may behave differently. This understanding should help moderate the inevitable confusion when faced with unreliable airspeed.
Just my view anyway.