How often has Rock Auto completely “Lost” a part you have ordered?

For the first time Amazon lost a part I had ordered for next day delivery.
I assume “lost” means stolen during shipment,
aka “It fell off a truck”.

I later found out my “lost” part,
a Borg Warner transmission part that was supposedly the OEM to Chrysler,
was on national back order with no known date when it would become available at Mopar dealerships.

Presently Rock Auto lists more than 3 suppliers who they claim have the part.