When you click that badge on your desktop and you are taken to the area of security at a glance and you click Device Security you should see the Core Isolation area and the message stating that the feature is off when actually you see that it is on.
Here is my take on this a Scammer organization has taken advantage of a weakness in an update and are controlling that area to give the message that is seen.
Out of the blue one night, I got a phone call with a message informing that "We noticed that one of your security features has been turned off, to correct this issue press # 1"
I am not sure exactly what the number to press was, however, my question is how did they know if I had or did not have a security feature turned off or on.
Kenneth