not deleted createReply with O365 API

I make message system with graph api.
And I used 'createReply' api.

But the draft message not deleted after send createReply message.

It is deleted from the web page(Outlook.office.com).

But it's not deleted from my webpage.

I used api is '/me/messages/{id}/createReply'.

The same is true for createForward and createReplyAll.

Why not delete it?