Which makes sense. The material and cladding was probably scheduled for ongoing delivery until 2023 which was originally when the building was supposed to be completed. It takes time and money to delay production and shipment, so Mizrahi probably received ownership of the cladding and stored them in a warehouse.
There's a possibility that maybe the additional 20m (308m to 328m) of cladding and finishes might be able to be cancelled without too much issue. But as always, this is all just massive amounts of speculation. Until we hear directly from the owners/builders, we will not know for sure what is going to happen!