Winget config file appearing not to honor source?

Brief description of your issue

Configuration file failing - appears to not honor "source" value. The first step in the configuration file has source set to winget. However, the file doesn't work unless running running winget remove source msstore

Steps to reproduce

1. Spin up sandbox with WinGet
2. Run this WinGet configuration file dotnet_configuration.zip

Expected behavior

For the file to work again :P

Actual behavior

The configuration fails at the first step.

Environment

Windows: Windows.Desktop v10.0.26100.2033
System Architecture: X64
Package: Microsoft.DesktopAppInstaller v1.23.1911.0

Winget Directories

Logs %LOCALAPPDATA%\Packages\Microsoft.DesktopAppInstaller_8wekyb3d8bbwe\LocalState\Diag…
User Settings %LOCALAPPDATA%\Packages\Microsoft.DesktopAppInstaller_8wekyb3d8bbwe\LocalState\sett…
Portable Links Directory (User) %LOCALAPPDATA%\Microsoft\WinGet\Links
Portable Links Directory (Machine) C:\Program Files\WinGet\Links
Portable Package Root (User) %LOCALAPPDATA%\Microsoft\WinGet\Packages
Portable Package Root C:\Program Files\WinGet\Packages
Portable Package Root (x86) C:\Program Files (x86)\WinGet\Packages
Installer Downloads %USERPROFILE%\Downloads

Links

Privacy Statement https://aka.ms/winget-privacy
License Agreement https://aka.ms/winget-license
Third Party Notices https://aka.ms/winget-3rdPartyNotice
Homepage https://aka.ms/winget
Windows Store Terms https://www.microsoft.com/en-us/storedocs/terms-of-sale

Admin Setting State

LocalManifestFiles Disabled
BypassCertificatePinningForMicrosoftStore Disabled
InstallerHashOverride Disabled
LocalArchiveMalwareScanOverride Disabled
ProxyCommandLineOptions Disabled
DefaultProxy Disabled

Start with the attached dotnet_configuration.zip and reproduce the failure in a WinGet sandbox using the stated Windows and AppInstaller versions. Investigate why the first configuration step does not honor source=winget; done means the configuration runs successfully without removing the msstore source.