In Leap Steel, including shear studs or not in the negative moment regions changes the results of the moment diagram for composite load cases.

Not including shear studs in the negative moment regions decreases negative moment values and increases positive moment values. This most likely happens because Leap Steel is not utilizing composite section behavior when shear studs are not included, causing redistribution of moment between negative and positive moment regions as stiffness changes.

Even when shear studs are not included in the negative moment region, composite section behavior can still be present. An option to utilize composite section properties in the negative moment region independently from the presence of shear studs would improve composite moment calculations.