Hi!
I am having this issue lately too, I also have scheduled posts and no thumbnails, until a two weeks ago everything was ok, I changed a few settings and I changed theme (that I reverted to the default one again) and then it stop working. Can you help please?
Actually, it is not fixed. I am reviewing all my posts now, and the only way I can remove tags from a post is through Mass Edit Terms section. Some posts I can save without any tag, while others are forced to have tags for some reason I can’t understand, usually longer posts.
