Bug in automatron expansion (Fallout 4)

the automatron began to go through the add-on and then noticed that the workbench for robots somehow works incorrectly, I want to change hell, I change my legs to the legs of the assaultron, and for some reason it hovers above the ground, if you choose another improvement, for example, the case, then when you choose the case itself, it still appears legs, don't choose legs anyway, if you go to the workbench and select a body or something else and put armor on the body, then the game crashes, in general, nothing in hell can be improved, the game will spill out, the same will happen if you create another robot, guys tell me how it is treated ?