We have solutions with mixed C++ and fortran projects. We have many crashes when cleaning the projects either by doing clean solution, or just by cleaning one project by itself. However, it is not consistent and i can not reproduce it in a small solution that i could send. When a project clean is crashing, i could just clean other projects and come back to the first one and it would not crash anymore.
This only happen on fortran projects, not the C++ ones.