Answer:
By default, load combinations are calculated according to the second-order analysis, and load cases according to the linear static analysis. It is possible that the stiffness is also reduced by a standard-dependent partial safety factor when calculating according to the second-order analysis, which has a corresponding effect on the deformations.
In order to obtain the same results in the load case and in the load combination, it would be necessary to regulate the consideration of the stiffness factors uniformly for this case, among other things (see the image).
