wslpath -w /mnt/c works differently than expected

[matushorvath]

When I run 'wslpath -w /mnt/c', it returns C:\WINDOWS\system32\c. I would expect it to return C:\ or something similar. Running wslpath with different paths works as expected.

$ wslpath -u c:\Documents
/mnt/c/Documents
$ wslpath -w /mnt/c/Documents
C:\Documents
$ wslpath -u c:
/mnt/c
$ wslpath -w /mnt/c
C:\WINDOWS\system32\c
$ wslpath -m /mnt/c
C:/WINDOWS/system32/c