There is a new feature in 2.8.0.beta7 which is Permanent deletion of posts and topics.
However when I enable it and try to use this feature, it will cause chrome and firefox not responding. I don’t know why it will happen.
Maybe there are some bugs in deleting a post permanently.
I enable the CDN.
The post can be deleted permanently via this feature, when I refresh it, it says can not be found. However I just don’t know why it will stuck the browser and no respond.