One location where this is going to happen is "The Caverns of Time" and the tunnel in Orgrimmar. Maybe other locations, too.
Please see the screenshot. No error.
It's a bug in WoW not Carbonite. If your minimap is transparent at all this happens in some spots, the only way to not have it happen is by docking it in that location (which forces it to be non-transparent) or set your minimap transparency to 1 in the transparency settings.