It hasn't yet, and needs reporting actually. I'm sure someone has already, check the Bug thread.
I've already reported this bug with the galaxy map always showing "Economical" route mode, but if you want to add to the report please go and add your comment that you're seeing this too.
Actually, after testing this on a couple of ships, what is actually happening is that the setting you were previously using is still being remembered, so if you have been plotting "fastest" routes, it will still carry on plotting fastest routes even though the flag appears wrong on the screen.
At the moment as a workaround, if you are already plotting fast routes and you want to plot an economy route, you have to :
- change the flag to fastest route, and plot.
- Change the flag back to economical, and replot the route again. You will then get a proper economical route.