Qt Module 'Help' not imported

If a Qt project file (*.pro) is opened in Qt Visual Studio Tools which does make use of Qt Help the Qt 'help' module is not imported into the Visual Studio project file.

For a short test case one can open the Qt 'Context-Sensitive Help Example' in Qt Visual Studio Tools. A look into the Visual Studio Project properties under 'Qt Project Settings / Qt Modules' shows that the 'help' module is missing (see screenshot of Visual Studio project properties below). That leads to linker errors.

This might be a regression, because I never had this issue with previous versions of Qt Visual Studio Tools.

My test components:
OS: WIndows 10 Professional 64 bit Version 1903
IDE: Visual Studio 2019 Community Version 16.2.4
Expansion: Qt Visual Studio Tools 2.4.0
Qt: Version 5.13.1 using MSVC 2017 64 bit