Scaffolding: Identity Scaffolding on Ubuntu 20.04 using incorrect file paths

Output of dotnet --info:

.NET Core SDK (reflecting any global.json):
 Version:   3.1.302
 Commit:    41faccf259

Runtime Environment:
 OS Name:     ubuntu
 OS Version:  20.04
 OS Platform: Linux
 RID:         linux-x64
 Base Path:   /usr/share/dotnet/sdk/3.1.302/

Host (useful for support):
  Version: 3.1.6
  Commit:  3acd9b0cd1

.NET Core SDKs installed:
  3.1.302 [/usr/share/dotnet/sdk]

.NET Core runtimes installed:
  Microsoft.AspNetCore.App 3.1.6 [/usr/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 3.1.6 [/usr/share/dotnet/shared/Microsoft.NETCore.App]

While following the Microsoft docs guide on scaffolding Identity, I was unable to scaffold Identity, presumably because the scaffolder is looking for files with the naming pattern Filename.cs.cshtml instead of Filename.cshtml.cs.

I initially tried scaffolding with a netcoreapp3.1 with Microsoft.VisualStudio.Web.CodeGeneration.Design 3.1.4, but when this failed I tried with netcoreapp3.0 and Microsoft.VisualStudio.Web.CodeGeneration.Design 3.0.0. Both runs were identical.

Steps to reproduce:

1. Install the code generator: dotnet tool install -g dotnet-aspnet-codegenerator
2. Create a project to scaffold into: dotnet new mvc -n IdentityApp -au Identity
3. cd into the new project directory
4. Install Microsoft.VisualStudio.Web.CodeGeneration.Design
5. Install Microsoft.EntityFrameworkCore.SqlServer because scaffolding doesn’t seem to work without it
6. Build the project to make sure everything works (build OK)
7. Scaffold all Identity pages: dotnet aspnet-codegenerator identity -dc IdentityApp.Data.ApplicationDbContext

Expected behavior:

All Identity.UI Razor Pages are scaffolded into the project

Actual behavior:

A fatal error indicating a file was not found:

Building project ...
Finding the generator 'identity'...
Running the generator 'identity'...
A file matching the name Account.AccessDenied.cs.cshtml was not found within any of the folders: 
   at Microsoft.VisualStudio.Web.CodeGeneration.ActionInvoker.<BuildCommandLine>b__6_0()
   at Microsoft.Extensions.CommandLineUtils.CommandLineApplication.Execute(String[] args)
   at Microsoft.VisualStudio.Web.CodeGeneration.ActionInvoker.Execute(String[] args)
   at Microsoft.VisualStudio.Web.CodeGeneration.CodeGenCommand.Execute(String[] args)
RunTime 00:00:16.85

Additional information about the project being scaffolded, such as:

Target framework(s): netcoreapp3.1 and netcoreapp3.0

Package version of Microsoft.VisualStudio.Web.CodeGeneration.Design - this may be added to your project by scaffolding: 3.1.4 (netcoreapp3.1) and 3.0.0 (netcoreapp3.0)