safari "compass" icon persists after download

I just updated to iOS High Sierra 10.13.1, and since then, when I do a download through Safari, the Safari "compass" icon appears during the download, but then persists on the screen when the download is completed. If I switch to other program screens, the "compass" icon shows up there as well. I have to quit Safari to make the "compass" icon go away. Any ideas about a fix? I am running Safari 11.0.1 on a late-2013 iMac with a NVIDIA GeForce GT 750M 1 GB graphics board.