Expired s3 Backup Recovery Point

I configured AWS Backup in CDK to enable continuous backups for s3 buckets with this configuration :

• backup rule : with enableContinuousBackup: true and deleteAfter 35 days
• backup selection : with resources array having the ARN of the bucket directly set and roles setup following the docs of aws : https://docs.aws.amazon.com/aws-backup/latest/devguide/s3-backups.html

Later I deleted the stack in CDK and ,as expected, all the resources were deleted except for the vault that was orphaned. The problem happens when trying to delete the recovery points inside the vault, I get back the status as Expired with a message Insufficient permission to delete recovery point.

• I am logged in as a user with AdministratorAccess
• I changed the access policy of the vault to allow anyone to delete the vault / recovery point
• even when logged as the root of the account, I still get the same message.

• For reference, this is aws managed policy attached to my user : AdministratorAccess , it Allows (325 of 325 services) including AWS Backup obviously.
• Here's the vault access policy that I set :

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Principal": {
                "AWS": "*"
            },
            "Action": [
                "backup:DeleteBackupVault",
                "backup:DeleteBackupVaultAccessPolicy",
                "backup:DeleteRecoveryPoint",
                "backup:StartCopyJob",
                "backup:StartRestoreJob",
                "backup:UpdateRecoveryPointLifecycle"
            ],
            "Resource": "*"
        }
    ]
}

Any ideas what I'm missing here ?

**Update ** :

• A full week after creating the backup recovery point, and still unable to delete it.
• I tried deleting it from the AWS CLI but no luck.
• I tried suspending the versioning for the bucket in question and tried, but no luck too.