This is documented behavior. Per the docs for os.DirEntry's stat method (the objects yielded by os.scandir):

>On Windows, the st_ino, st_dev and st_nlink attributes of the stat_result are always set to zero. Call os.stat() to get these attributes.

It might be nice if those values could be cached on read (through a lazily initialized value on property access or the like), but this is not a bug, it's working as documented.