Hi @Dusty H Thank you for posting your Question on Microsoft Q&A.
Please check the below point if none of those apply to your case then please try again.
Operations that are not supported
You can't scale to or from a Premium cache.
You can't change from a Standard to a Basic cache.
You can scale from a Basic cache to a Standard cache but you can't change the size at the same time. If you need a different size, you can do a subsequent scaling operation to the desired size.
You can scale up from a C0 (250 MB) cache to a larger size, but you can't scale a larger size down to a C0 cache.
If a scaling operation fails, the service will try to revert the operation and the cache will revert to the original size.
Please let me know the result.
Regards,
Oury