Cannot Set Featured Image

I looked in the past tickets and it looks like this has been a bug that was fixed but must be back. I use it and there is no way to set a featured image. When I select an image, it goes inline for the content. I then have to select Standard Editor, delete the image and then select it via Featured Image. Would be great to add/fix this.

I am running WP 4.9.8 and have all available updates, including Plugins, applied.