In response to Hzoi and the A Team. It happens all the time whenever I'm on the geocaching website which looks to me like google maps. The area doesn't seem to matter. I could be anywhere. As CAVinoGal mentioned, sometimes they just partially disappear. Sometimes they all disappear. I am using Chrome as the browser. As I mentioned before, this was an issue awhile back and it seems as though it was fixed but now back again.