Hi @pceuropa,

Thanks for your feedback. Envira crops according to the settings chosen (i.e. – lightbox thumbnails). Depending on your settings, this can create several cropped versions.

We generally recommend that you use the Regenerate Thumbnails plugin should you need that functionality: https://wordpress.org/plugins/regenerate-thumbnails/.

If you have any further issues, please feel free to reach out to support at https://enviragallery.com/contact/

Have a great week!