I made four node groups in blender and saved the blender file to my hard drive. I want these node groups to appear every time I start Blender, so I do have not append them every time I need them. So I opened up a new blender file, clicked on "append" and appended all of the node groups from other blender file. I click on save start-up file and exit. When I open blender again, the node groups appear but not all of them. Only one or two. if I append the missing node group again, and save it again, the next time I open up blender all node groups are gone. It is like random.
Am I doing something wrong or something is broken with blender?