Featured Image

I am unable to set a featured image. If I set a filename in the “image file” column, I seem to get a very small version of the image…
I have to go and edit the download and choose “Add Media” and pick the same file i was trying to import in the “image file” column from the “Set Featured Image”. At that point the image selected displays its size and it works… Wondering if there is a fix for that to avoid having to manually input featured images…

https://www.ads-software.com/plugins/easy-digital-downloads-csv-manager/