OO doesn't refresh the rename of a course on the "Change course info" in the tool-bar bread-crumb and the top nav tab immediately.
The refreshing of the page doesn't help to activate the new name and users are confused doing the change at the wrong place in the system particularly as they are confused anyhow at this process because it is needed to change it at two places (which is ok formally).
The change should be immediately visible in the breadcrumb and the toolbar for the user who modified the course title to feel save that the change has been applied. For all other users that are in that course at this time the course title in the breadcrum and the navigation does not need to be changed immediately. They don't know anything about this change, so it is ok to be a bit lazy there.