eg. I map a route, it maps half the lines and leaves half out.
then I map a different route and it still has the previous route mapped out
switch to a different zoom and it maps the new route, but zoom out again and the old blue lines are there from the previous route
???
then I map a different route and it still has the previous route mapped out
switch to a different zoom and it maps the new route, but zoom out again and the old blue lines are there from the previous route
???