Recently Facebook has been using the wrong image in some post previews. I just want it to use the featured image. When the wrong image is used, it's always the same image from a 9/23 post, which is when this issue started.
All my blog posts have featured image, and I've run a bunch of them through the facebook debugger (https://developers.facebook.com/tools/debug) and all of them have proper og:image metatags and are showing the correct image on the debug side but some are nevertheless displaying incorrectly on my page.
I've read in some places that running posts through the debugger might clear the facebook cache, but I ran some of these through 6 days ago and no change has occurred.
Example of a blog post which generated a correct preview: http://viterbiconnect.usc.edu/go-global-student-panel/?fb_source=pubv1
Example of a blog post which generated an incorrect preview: http://viterbiconnect.usc.edu/mandatoryadvisement/?fb_source=pubv1
I've looked at lots of similar threads (see below), but can't seem to make any progress.
Any help in even determining what could be wrong would be greatly appreciated! Thank you in advance for any advice!