I’ve had the maps on my GPS for a few weeks now, testing them with routing every now and then. It seems weird stuff is happening when roads cross highways (I guess: in general 2 roads crossing each other) without an intersection or connection.
As an example, take the situation near N51 33.217 E5 28.662 (let’s call that X).
I’ve created 2 waypoints: N51 30.823 E5 27.317 and N51 33.440 E5 28.226, and created a route between them. For some weird reason the road first takes the A50, turns at the first crossing after X, goes back at the other side of the A50, and then goes to the Nijnselseweg, which is actually on a bridge over the A50. I’ve checked the OSM data, but it is not a mistake in the data as far as I can see.
I’ve seen this in a few more places by the way, this is not a single weird place.