Hi Bill, I wondered if it was because I turned off AI but when I turned it back on, it was still doing the same thing. ( I turned off AI because I wanted to have more confidence in the info I was looking up.) Perhaps I will turn AI back on, do a restart and try again.
OK, that is odd, I turned on AI again, it said "downloading the model" (or something similar) so I waited just a bit longer than on my previous test. Then I said the "Hey Siri" thing and got the Halo. So I turned off AI again, and said the "Hey Siri" thing and STILL GOT THE HALO." But after a few minutes I tried again and the halo was replaced by the old circular thingy at the bottom. So timing is important and I guess you really do need AI on to get the Halo.