My site has starting being somewhat selective on what shows up in the Media Library, though (for example, Featured Images) I have no problem seeing all the files I uploaded on the frontend. But, for instance, if I upload a Featured Image to one post, save and go back to Posts and open another post, if I try to set the same image to be the Featured Image of the second post, clicking on that box to do so, it won't appear as being in the Media Library. In that instance, I'd have no choice but to upload the same image again in the second post.
In short, Media Library is acting weird. Any pointers?
I don't think it's a plugin issue as nothing has changed in my configuration, nor has it been updated; in addition, I reinstalled Wordpress, but the fault remains. I'd also like to know if anyone knows of a way to pull into Media Library resources uploaded but that didn't get included, for whatever reason. I know about the "Add from Server" plugin. At least two people are reporting it broken on WP v.4