I don't quite know where to post this.
I'm trying to use an image in a post and use that same image as the post thumbnail.
I can get this to work fine, if I search for the image twice from the media folder (once for the insert and once for the thumbnail).
It seems I can do both functions at the same time, but it doesn't take. I search for the image and choose 'Use as thumbnail' and the thumbnail appears to be chosen, then I choose "Insert into post" and publish the post. After publishing, the thumbnail field returns empty. I have to go get the image again.
Is this intended, or have I broken something?