Recently I've encountered the following problem.
1. Load a course
2. Deviate from course
3. No message that I'm not course anymore OR questions whether I want to pause/stop navigation of course.
4. When I look on the map, the course is not visible anymore.
5. Even when I'm back on course, it doesn't automatically enable navigation again.
6. To overcome this issue, I have to manually resume navigation.
Earlier, there was no issue with deviating from course as it would indicate this and resume navigation as soon as I would be back on the course again. The only change I did was recently update to the latest firmware/software version of my Edge 840. It also resetted various settings incl all my previous (device) records. My goal is to get a message when I deviate but also that my device automatically resumes navigation when I'm back on course.