Error list shown although "Always show Error List if build finishes with errors" is not checked

[donnie-msft]

Details about Problem

Developer Community: https://developercommunity.visualstudio.com/content/problem/177400/error-list-shown-although-always-show-error-list-i.html

NuGet causes Error List to popup during Build even when VS settings are set otherwise.

Detailed repro steps so we can see the same problem

1. Create a .csproj-style project.
2. Break the referenced NuGet packages in some way (eg, modify PackageReference or Packages.config to point to a nupkg version number that does not exist.
3. Modify the VS settings so that "Always show Error List when a build fails" is unchecked.
4. Compile the solution.
5. The Error List will take focus.
   ...

Other suggested things

Verbose Logs

Please include verbose logs (NuGet.exe -verbosity detailed | dotnet.exe --verbosity diag | etc...)

Sample Project

Very helpful if you can zip a project and paste into this issue!

[zivkan]

#8691 is a duplicate, but adds that if the error list is closed before restore, it will be displayed, even when there are no errors.