Won't route via Red Funnel

🚧 THIS IS A TICKET MIGRATED FROM UPVOTY. The original ticket and comments will be available for a limited time over at:
https://abrp.upvoty.com/b/report-a-bug/wont-route-via-red-funnel/
———————————————————————————
ABPR won't route via red funnel from the Isle of Wight. I've even tried putting in the East Cowes red funnel port and the Southampton red funnel port as waypoints it STILL tries to take me via Wightlink, many miles further.