roslyn: IDE0130 not showing as warnings in VS 16.10.3

Version Used: Visual Studio 2019 16.10.3

Steps to Reproduce:

1. In VS 2019 (v 16.10.3), create a new C# project targeting .Net 5.0
2. Add a new .editorconfig file. This automatically includes dotnet_style_namespace_match_folder = true
3. Change the namespace of any class so that it doesn’t match the folder name

Expected Behavior: The IDE should show warnings for IDE0130

Actual Behavior: No warnings are shown for IDE0130

I have also tried changing the severity of the rule with each of the following lines in .editorconfig

• dotnet_analyzer_diagnostic.severity = warning
• dotnet_diagnostic.IDE0130.severity = warning

I have also tried referencing the Microsoft.CodeAnalysis.NetAnalyzers nuget package version 5.0.3.

In short, I think this is a feature that has been released since VS 2019 16.10.0 but I’m not sure how to get it working. Are there any extra configuration steps that need to be done?