Jeremy,
I don’t think that any of my plugins are image related.
The thumbnails at the following link were affected: https://fbcranson.com/category/sermons/
Here is source with photon:
<img src="http:/i1.wp.com/fbcranson.com/wp-content/uploads/2012/09/Sermon-Graphic-July-29-2012.jpg?resize=376%2C443-188x188.jpg?resize=376%2c443" class='post-thumb' alt='Cursed Is The Ground' width='188' height='188' />
And without:
<img src="https://fbcranson.com/wp-content/uploads/2012/09/Sermon-Graphic-July-29-2012-27597_188x188.jpg" class='post-thumb' alt='Cursed Is The Ground' width='188' height='188' />
Active theme: https://www.elegantthemes.com/gallery/modest/
List of active plugins:
Blubrry PowerPress
BulletProof Security
BWP Google XML Sitemaps
Exclude Pages from Navigation
Exploit Scanner
Google Maps
Jetpack by WordPress.com
SEO Ultimate
Sucuri Security – SiteCheck Malware Scanner
Wordfence Security
Yahoo! WebPlayer