I had a look on your server and tested version 1.8.0 and version 1.9.5.
You worked on an server with CDN-Synchronisation and a quit complex setup.
As you stated version 1.9.5 do not to show a different image after cropping.
When cropped with 1.8.0 the old image is no longer visible (CDN do not have the image anymore). So there is a different behavior, but i can not confirm that it was working with 1.8.0. I left this version on your system.
In the end, my plugin do not support a CDN based file-system out of the box. If you experience problem with this plugin you may be on your own. As i do not use CDN based systems for my own i could not help you. You may have a look on the github page of the plugin (https://github.com/vollyimnetz/crop-thumbnails) i added a lot of filters and hooks to the save procedure. You may trigger CDN file synchronization on you own, after the plugin cropped the image.