cloud backup 'Automatic Striping' option "Auto". Azure Cloud server returned "(400) Bad Request., blocks was 52598 * 4 Mb = 210392 Mb" (4257198)

We are wanting to perform automatic striping of full backups from an availability group to Azure. Our smaller databases backup without an error. When backing up the largest database, the error below is returned by the Azure Cloud server when we attempt to use the 'Automatic Striping' option setting of "Auto".

The remote server returned an error: (400) Bad Request., blocks was: 52598 * 4 Mb = 210392 Mb

This happens both when backing up from the primary replica and the secondary replica.