"PutWithBucketOwnerFullControl" privilege missing for storage configuration

Akira
Databricks Partner

Hi. I've been unable to create workspaces manually for a while now. The error I get is 

"MALFORMED_REQUEST: Failed storage configuration validation checks: List,Put,PutWithBucketOwnerFullControl,Delete".
 
putwithownercontrols_error.trimmed.png
 
The storage configuration is on a bucket that has a policy and other properties exactly as documented. In case the documentation was wrong I also confirmed it is exactly the same as new ones created by the CloudFormation template.
 
"PutWithBucketOwnerFullControl" is a mystery term. I guess it's an enum in Databricks control plane code that no-one else can see. The only other reference I can find was from unsolved problem Nov 12, so I'm guessing this is a regression introduced with the Nov 8th release.
 
Could someone please help?