Plugin code for plugins located in an AdditionalPluginDirectories directory is not being included in the project's solution

In the 4.17 release notes, there is a note that mentions that plugins added to a directory in the AdditionalPluginDirectories list in the .uproject file would automatically get included in the generated code project for Visual Studio. This does not appear to actually be happening.

1. Create a new Basic Code project.
2. Add a new plugin to the project. Make sure the plugin is created in a non-standard location on the drive, such as in an empty folder on the desktop (this will add an AdditionalPluginDirectories entry into the .uproject file).
3. Close the Editor.
4. Right-click the .uproject file in a Windows Explorer window and select the Generate Project Files option.
5. Open the solution in Visual Studio.

RESULT:
The code for the plugin is not included in the solution.

EXPECTED:
The code for the plugin is included in the solution.