Case sensitive filesystems, Darwin builds

When extracting the source distribution for v1912 on MacOS, I got a warning for name clashing of two directories (thanks to the fact that the default MacOS filesystem is case preserving but case insensitive). They are:

src/phaseSystemModels/reactingEulerFoam/interfacialCompositionModels/interfaceCompositionModels/interfaceCompositionModel src/phaseSystemModels/reactingEulerFoam/interfacialCompositionModels/interfaceCompositionModels/InterfaceCompositionModel

It's the first time I'm building OpenFOAM, so a first question arises: should I create a temporal case-sensitive DMG and extract it there? Or is there a bug/typo in the v1912 distribution?

If it's not a typo and it's intended, let me say it's pretty confusing to have two source directories with the same name and only a case difference in the first letter...