XP Navdata does not recognise that the HAPPS waypoint is part of the T447 airway, which it should according to the FAA CIFP (https://www.faa.gov/air_traffic/flight_info/aeronav/digital_products/cifp/).
SUSAER T447 0140HAPPSK6EA0E RL 023800620238 02400 17500 616412403
Is the relevant line in the CIFP