Hi Adrian,
Thanks for your quick reply, and thanks for your test and confirmation.
I think now we have found the reason. Our website has many properties for sale, and some agents from several different real estate companies are selling the same property on our website, and they upload the same images of the property. That’s why these kinds of images are misunderstood as duplicated images.
We apologize for the misunderstanding.
By the way, this plugin upload the images very fast.
Thank you.