First I disable all the services of root options since Configure > Services. Then, in the context menu on folder space, still appear root options without list the dropdown because before they were disabled. Service's Developer: https://store.kde.org/p/998469/ Response of developer: "I can confirm the behavior in dolphin. However, that part is handled by the file manager (and not by the service menu), so technically it is a bug in dolphin (which I cannot affect by the menu code). Seems like the bug doesn't affect krusader, for example, so it's likely specific to dolphin code."
*** This bug has been marked as a duplicate of bug 395211 ***