Hjart
Routing with https://www.openstreetmap.org/directions?engine=graphhopper_car&route=55.64904%2C12.13734%3B55.64824%2C12.12703 works fine and I don't see any obvious mistakes in the data either. I don't know how to test OpenTripPlanner, but could it be that the data used isn't quite up to date?