Asignemnt grade not visible after removing a group from a grouping

We use Moodle 2.4.2 and have an asignment in our course limited for Grouping A, that includes a GroupA with a studentA.

StudentA submits an asignment, it is graded, and he can see the grade.

We remove GroupA from GroupingA and studentA can't see his grade anymore. Is that logical? Can we change it? We want to enable studentA to si his grades as long as he is a part of this course.

Thanks