I agree with Hara. I would call them about their late shipment.
You will have more than the normal die off but Life is amazingly resilient. It will take weeks/months but you will continue to find new life appearing on the rock over time.
I have what was once pure white base coral caribbean reef rock that can't be differentiated from the LR
I bought. Well, if I pull a piece from the sand that piece is still as white as the day I got it, but anything above the sand line looks similar now.