Issue with remote images and/or unable to create plugin image size

Hi Marty!
This is an exceptional plugin and I thank you for creating it.
I would like to point out a small issue that will not affect most users, but, nonetheless, you might want to address in some future release.
I think that you are not using the correct path to display the images.
This occurs when another plugin or the wp-config.php file changes the path, for instance, the ‘Media Cloud’ and ‘Offload Media’ plugins which change the image URL to An AWS (Amazon) S3 bucket and/or AWS Cloudfront.
Please refer to the screen capture at https://imgur.com/FnQDoiN
This screen capture shows the difference between your plugin and two other plugins.
Is it really necessary to create yet another image size for the express use of this plugin? It seems to me that you could simply iterate through all the registered image sizes, starting from the smallest, and just re-size them in the html. After all, the admin side is not subject to SEO/Page Speed/Y! Slow penalties for re-sizing images in html.
Notice the difference between the first post shown and the second post. I also use the remove the original image after upload feature of, in my case, the Media Cloud plugin, so perhaps your plugin is attempting to generate its own sized image from a [now] non-existent image.
Note that in the first post, your plugin IS processing the image from AWS. Also note that in my particular situation, I only save/process one (1) image size, a cropped 300 by x (cropped) image.
If you decide to look into this matter, I am completely at your disposal to provide any assistance that I can.
Regards and Thanks Again,
@brianbrown