I had this same issue of the mystery linked directory. In my case I found that the linked sub directory had a name consisting of a single space character so it appeared as though it had no name. If I could rename the folder in the recycle bin, I expect that I could restore it to the original location or drag-and-drop it to a different location. How do I rename the folder in the recycle bin or access the recycle bin from the command prompt or PowerShell.
I have some files in there that would take a long time to recreate. (size of file in recycle bin is 1GB.)