Environment

Windows build number: 10.0.20201.0
Windows Terminal version (if applicable): 1.3.2372.0

Any other software? Nope

Steps to reproduce

In Powershell: $Env:UserName

In cmd: echo %UserName%

It looks like this variable is defined here: HKEY_CURRENT_USER\Volatile Environment

There are a couple of other variables defined there that are also undefined: %USERDOMAIN% and %USERDNSDOMAIN%

This is only happing after updating to the preview version of Terminal 1.3. The variables are still defined in Terminal 1.2, and when running pwsh/Windows Powershell/cmd outside of Terminal.

Expected behavior

The variable should contain the current user name.

Actual behavior

The variable is undefined.