can not map \\wsl$\xxx\xxx path to a network drive

Please use the following bug reporting template to help produce issues which are actionable and reproducible, including all command-line steps necessary to induce the failure condition. Please fill out all the fields! Issues with missing or incomplete issue templates will be closed.

If this is a console issue (a problem with layout, rendering, colors, etc.), please post to the console issue tracker.

Important: Do not open GitHub issues for Windows crashes (BSODs) or security issues. Please direct all Windows crashes and security issues to secure@microsoft.com. Ideally, please configure your machine to capture minidumps, repro the issue, and send the minidump from "C:\Windows\minidump".\

See our contributing instructions for assistance.

Please fill out the below information:

• Your Windows build number: (Type ver at a Windows Command Prompt)
  10.0.19013.1
  wsl2 with ubuntu 18.04

• What you're doing and what's happening: (Copy&paste the full set of specific command-line steps necessary to reproduce the behavior, and their output. Include screen shots if that helps demonstrate the problem.)

1. in explorer, mapping a network driver with path \wsl$\Ubuntu-18.04 succeeded,
2. in console, "dir \wsl$\Ubuntu-18.04\home" can display directory correctly.
3. in explorer mapping a network driver with path \wsl$\Ubuntu-18.04\home failed, with error windows can not access \wsl$\Ubuntu-18.04\home

• What's wrong / what should be happening instead:
  mapping \wsl$\Ubuntu-18.04\home a network driver should succeed

• Strace of the failing command, if applicable: (If some_command is failing, then run strace -o some_command.strace -f some_command some_args, and link the contents of some_command.strace in a gist here).

• For WSL launch issues, please collect detailed logs.

Start by reproducing the Explorer network-drive mapping steps for \wsl$\Ubuntu-18.04 and the working console dir command. Review the WSL contributing instructions for detailed logs, since no source file or test is named. Done means mapping the /home path succeeds as described.