Uploaded images are automatically replaced

Hello @amedic,

Do you have some plugin which regenerates the image thumbnails?

Ideally though, you should edit the thumbnail size from wp-admin -> settings -> media. and them regenerate the thumbnails.

Here is a post which explains this in more detail – https://www.wpbeginner.com/plugins/regenerate-thumbnails-new-image-sizes-wordpress/

Closing due to inactivity.

If you are still having this issue @amedic, Feel free to open up a new ticket at wpastra.com