Deactivating JetPack Photon
Disabling the WordPress JetPack Photon function temporarily. With the latest JetPack release, Photon is messing up resized images, or rather is not adhering to image sizes. In preview mode, the images look fine, but when published, the images display in their native size.
Disabling the JetPack plugin resolved this issue, so that helped isolate the culprit. Now I’m specifically deactivating Photon to see the impact.