We have a WP site (6.0.x) running on PHP7.3. No changes made recently except for content. Suddenly, featured images are not attaching to posts.
Here’s what I know:
Old posts from beyond 2 weeks ago have featured images and display them properly in the control panel and the post.
New posts can have some featured images attached, but only if the attachment details are present on the image.
Newly uploaded images through the post featured image work initially, but then the attachment details are removed.
When adding an image as the featured image, the admin-ajax.php call returns `success` in the json, and the associated HTML that displays the Featured Image is being sent as well. If the image has attachment data listed in the Media Manager, it will display; if not, it doesn’t.
Tried deactivating pertinent plugins, updating the themes. There are no PHP errors, no WP errors being returned by the debugging, no errors in the javascript console.
The only thing I can see that seems to lead anywhere is that new images do not have attachment data attached, but not seeing why that would impact things.
Can anyone point me in the right direction here?
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