Image unique filename

Hello

I have managed to activate the unique filename inside the plugin code(for the reason of saving images with multiple names as unique).

example link images :
example.com/image.jpg
eample.com/folder/image.jpg

When I import , the images get saved correctly , meaning they are saved as image.jpg and image-1.jpg , but the problem is that this unique filename image does not correspond to the post imported , instead I see the image.jpg as featured image.
If post 1 has first image link as featured and post 2 has second image link as featured image , when imported both posts have image.jpg as featured , even though the second image (image-1.jpg) is uploaded.

I hope you understand what I mean , do you have any suggestions?

ps: this plugin is great, it has helped me alot , this is the only problem I have

https://ww.wp.xz.cn/plugins/wp-ultimate-csv-importer/