Regression: C++ generated from QML throws compiler warning (declaration of unit vs. global declaration)

When building the attached application with Qt 6.8.2 and Unity build, the C++ code generated from QML files have multiple "unit" variables shadowing each other. This is visible as compiler warning on GCC:

warning: declaration of ‘unit’ shadows a global declaration [-Wshadow]

or on MSVC:

warning C4459:declaration of 'unit' hides global declaration

Unity build and warning level are already enabled in the CMakeLists.txt, just build it to reproduce the issue.

NOTE: This warning does not occur when building with 6.5.8.