Azure Database for PostgreSQL Flexible Server Stuck in Dropping State

I had provisioned an instance of Azure Database for PostgreSQL successfully through a custom ARM Template and then deleted it. A few hours later, I tried provisioning another instance with the same server name as the previous one. But the deployment has failed with an error - "Cannot read properties of undefined (reading 'createdAt')" and it is still in Dropping State. So, I tried provisioning another instance using a different name, that also failed and is also currently in Dropping State. The error for this instance is "Resource not found". I tried redeploying as mentioned in a similar post, but that did not delete the instance. Waited for a while and tried to create a third instance, but met with the same issue.

1. Please clarify if this will incur costs until they are deleted.
2. Please help get rid of these three instances.
3. Please provide an explanation for this behaviour.

Btw, the instances do not appear when viewed using the simplified view.

Thanks,
Anirudh Vasudevan