Unable to delete space

Greetings everyone!

Recently we found a very weird behavior in Confluence Cloud, it is about when we delete a space, the deletion got stuck and the space is unable to be deleted. Here is the context, we have an app that will attach an attachment to Confluence custom content. The deletion only got stuck when the space contained the content attachment, while we attach the attachment to the Confluence page instead of Confluence custom content, the deletion went well.

  • Attachment attached to Confluence custom content - delete space failed.
  • Attachment attached to Confluence page - delete space succeed.

We wonder why is this happening and why this only happens to the custom content attachment.
Appreciated your help and advice!

P.S: I’m the site admin of the organization and have all the permission granted in the space I wish to delete.