(Solved)Windows Ubuntu Subsystem mv folder disappeared but works with file

Problem

I am using Windows Ubuntu Subsystem 18.04. The command I run is

mv venv ../d/

and the folder can neither be found in current directory nor in d. This command is double checked from .bash_history. And, venv is a folder, d is a link to /mnt/d/ubuntu1804/ of my drive D in windows.

Also, I run command

mv a.txt ../d/

It works fine and the file can be found in d.

The current working directory is c which is a link of /mnt/c/ubuntu1804/.

Solution

Actually, the files are moved to the root of c drive named with d.