[Plugin: Auto Featured Image] Original Images Not Being Deleted

This plugin is working great for what I need, however, if an image that was uploaded using this plugin is deleted using the media library, it will leave the original file on the server. All other versions of the file will be deleted.

I tried the original plugin that this was forked off of, and it does the same thing, so I guess that is where the real issue is. Any way of fixing this?

https://www.ads-software.com/extend/plugins/auto-featured-image/