A normal scenario experienced in the sim, I personally keep an eye out for decreasing N1 during this initial part of the takeoff, if you wait for the NFP to point it out, you will more than likely end up departing the runway in which case you shouldn't be in heavy reverse or you will cause damage to a good engine, if you can pick up on the failure early, idle power and braking alone does a good job for you, just my 2 cents.
