This just appeared on the map builder this week. It's extremely annoying and makes it harder to see the map. I can't figure out how to turn it off. The only thing that I remember changing in my settings was to turn on the "Beacon for Mobile" and then the "Beacon for Devices" for Garmin. I tried turning them back off, but it didn't get rid of the blue circle. Not sure if it was actually related to this.