When I upload files to a selective sync folder, the "duplicate file warning" does not appear. If there are 2000 files, they are all uploaded from the beginning. I think this is a waste of energy for both Dropbox and me. However, in folders that are not selectively synced, the duplicate file warning appears well. And this is not a problem with the web browser, nor is it a problem with the operating system. This is because Dropbox emphasizes the "advantages of selective sync" in their marketing. I hope you solve this quickly. Thank you.
