AttachActorToComponent in construction script: moving problem


I am trying to attach Actor to child component of BP actor in construction script. When I move the whole BP actor everything works fine. If I move the child component, attached actor moves the double amount of relative location of the child component. Also when I load project construction script executes and attached actors move again :\

Here is video if I couldn’t explain it:

Is there any way make this work? Thanks.