I was looking on the app and couldn't get it to happen, got on the computer and found what you're talking about.
It appears when looking at a Route.
One workaround that might help: It disappears if you Edit the Route
Viewing Route:
Editing Route:
One more tip, since you mention the map being small, in the Edit screen, hit that square white icon in the upper left corner of the map in the Edit screen and you've got a BIG MAP!