After SWM_7.6_POST_HF7_v3.zip (INFO3459) installation it is not possible to change managed delivery policies on/off states. The on/off switch does not work from the right panel, aka Policy Wizard.
ITMS 7.6 HF7 with SWM_7.6_POST_HF7_v3.zip installed.
The issue is under investigation
It is still possible to change the states from the left panel -> right click actions, as a workaround.