[Regression] Xcode generator fails to create valid project

The attached project fails to generate with

CMake Error in CMakeLists.txt:
  The custom command generating

    /path/to/builddir/.qsb/shader.vert.qsb

  is attached to multiple targets:

    MyLib
    qsb_MyLib_meter_shaders

  but none of these is a common dependency of the other(s).  This is not
  allowed by the Xcode "new build system".

When run with

cmake -G Xcode -DCMAKE_TOOLCHAIN_FILE:FILEPATH=/path/to/Qt/6.5.3/ios/lib/cmake/Qt6/qt.toolchain.cmake /path/to/project

This works fine with Qt 6.4.2

I'm using cmake 3.27.7