Ford Mondeo power steering failure again?

I had the steering rack replaced 14 month ago on my X reg. Mondeo 2.0 litre with a reconditioned one, the other day the power steering failed again.
I can still steer but no assist, I have had the pump replaced still no luck, the garage recon’s it’s the steering rack.
Is this just unlucky or is there another problem that could cause the steering rack to fail?