put RBE in subcases

hello to everyone, I´m new in the forum and I´m having my first experience with hypermesh/optistruct.

In my model (a omega beam) I created 2 different load steps (bending and torsion), the bending is applied in the middle with a RBE2 and when i run the analysis I notice that during the torsion a stifness is added due to the RBE. I tried to use the RBE3 but doesn´t work well, because the displacement of the nodes is not due to a rigid body, but how if there was a force applied to each node (different displacement for each node).

is it possible to put the RBE2 in the bending subcase, so I will not have that stiffness during the torsion?

thanks in advance for help.