3.23.0-rc1: First of multiple source paths used instead of last

I am building my 4.x branch of https://gitlab.kitware.com/physiology/engine

This has a superbuild that will pull and build Eigen as part of the outer build

Configure/Generate a Visual Studio 2019 project (I am using 16.11.10) with project defaults

Open project and Build Solution

The build starts by pulling Eigen, and when it starts a build, it is trying to find this non existent source directory

CMake error : The source directory "N:/builds/pulse-engine-bug/External/Eigen3/build/Visual Studio 16 2019" does not exist.

When using CMake 3.22.2, Eigen's source directory is N:/builds/pulse-engine/External/Eigen3/src and build directory is : N:/builds/pulse-engine/External/Eigen3/build/

This new version seems to be trying to postfix the generator to the eigen path somewhere when it should not be?