See title Reproducible: Always Steps to Reproduce: 1. Open the KCM on a default system 2. Disable some of the check plugins 3. Click "Defaults" Actual Results: Nothing happens Expected Results: The default plugin set is active again Kubuntu 15.10
Fixed with commit: https://invent.kde.org/plasma/plasma-desktop/-/commit/be1eacc05b1f89f305c4d40164828a2bf9eae3d4 FIXED-IN: 5.17