I am using a Zumo 350LM on a motorcycle and the disobedience of the Trip Planner app is driving me mad! The major glitch, of several, is a tendency to ignore the route I have installed via Basecamp and simply hot foot to the destination by the most direct route available. In other words it over rides the planned route and does things like point me up the nearest motorway.
There are other issues but I'll start with this one. Huge thanks to anyone who can help with this issue.