It's not the ad blocker, turned it off and got the same behavior. I'm running a Mac OS 10.12.3 in safari. It's not the browser, I get the same behavior on Firefox and chrome. When I'm logged out, I see the banner (gotta be at the top to see it at all, right?, so that's not the problem). Then I log in, and the banner disappears. Weird. At least weird to me since I don't understand how me being logged in would affect it.
It's not all that important that I see the banner, so don't waste lots of time on it if it's just me.