Can´t complete set feature image

Hi

Please see attached screeshots. Inside a post, when trying to set a feature image, then from the media library, after selceting my image i can either press insert to post or set feature image. I have tried them both, they both says saving and then done. Then at very bottom there is only a save changes, i tried that also, after this i am stuck, It saves but do change page or do anything, so there is no exit button, i can close down the page or go back with the navigation bar but then i loose the changes..