Absolute Image URL in srcset is appended to the upload dir

I guess you worked around that issue – still I stumbled over your post having the same issue. I was able to work around by applying a bugfix from woozone itself – in your wordpress solution with woozone enabled go to:

  1. WZone -> Config -> Bug Fixes
  2. Scroll down to the option “Disable WordPress Images Srcset attributes”
  3. Set the option value to Yes
  4. Save the settings.

The issue was in my case that if multiple images were present, an woozone applied medias stored on amazon (my setting was on no but the plugin still does it in certain cases) the srcset was generated with the sites image upload url, followed with the absolute amazon url, as you described.