This is exactly what is happening with my site. Even the timeframe is matching mine. Tried debugging mode, no plugins, resetting AIOSEO settings, everything short of black magic, and nothing. Facebook needs to fix this now, seriously.

Is my error the same? I call api to upload attachment to facebook but response is empty array.

We're running into the same issue for partners on our app

Same error here, affecting essentially all of our clients

Same error. upload and send message image error

To add onto this — this bug is not just affecting link image previews. It is also affecting headlines, meta descriptions, and other data that is pulled when Facebook scraps a new URL.