That's the one, thanks for finding it.
So at least I know it's not a fault! I couldn't find anything in this forum about it.
I've done a little software design in my time and that interface is terrible.
Why assume that a route that has already been input and saved previously always needs to be changed immediately before use?
Why hide the instruction to 'Go on the route' behind an instruction labelled 'View Map', that isn't even visible on the menu?
Why not have the top line as 'Go' followed by either all of the editing selections or, even better, a selection button labelled 'Edit'?