During an activity with a course on, the GPS track record is always worse than without a course. Usually the inaccuracies are in the same place. Below are some examples, of course, there are also inaccuracies in other places of the route, but here it is basically always when the course is on. It doesn't matter if I have the map displayed or if I have another data screen visible. Of course, it's always the same type of activity with the same settings (All systems).
