Pr 26.2.2 Folders and files duplicate on reimport

I remember in the recent years when I drag-n-dropped a file or a folder into the same folder or subfolder in Premiere, if the folder name or the file name matched Premiere did not duplicate them but added the new files that missed. It was very convenient to update growing folders - when you are sent additional videos for the air and you don’t have to think where to import them to, you just drop them into the same folder the other similar vids are in and update the folder structure by simply dragging it on itself in the Project bin in Premiere thus getting the old files with the new, added ones.

It does not work anymore. Why? Was it broken? Now when you drop a file or a folder you get duplicates of everything even though the names match exactly:

Can you guys fix it already, please.