"Getting Name" bug on my worksheet

The icon looks similar to the "X people are here" icon. But in my case, I doubt it. I'm using my own file, it's not shared, and Excel simply doesn't need to look up my own name, for me, the already-currently-logged-on-user.

Unless there's a bug, and it can't actually do that, and when it realizes it's me, it hides the icon, but today for whatever reason, Excel hit a bug and couldn't retrieve my own name, and so, never hid the icon. Peut-être.