For some reason I have NEVER had a pop-up on our Ford Barn!
Neither have I,...but this is what I'm seeing now-
Have you tried logging out and logging back in? This procedure has worked for clearing up mystifying occurrences ever since I first got into the remote computing business in 1968.
I tried that with no luck, HOWEVER if I do a restart of the computer while on the Barn, the ads are gone when I return (still logged in).