Dover to Dunkirk ferry route not recognised

🚧 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/dover-to-dunkirk-ferry-route-not-recognised/
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When trying to select the Dover to Dunkirk ferry route it identifies it as either the Dover to Calais route or the Rosslare to Dunkirk route.