Hi there!

I get your point. We may have a real difficulty here because De Lijn provides detailed timetables through its GTFS files and they really drew the official itinerary there, and 100% of trips in the timetable found in those files (which are up-to-date, we regenerate them 3 times a week) show this.

I think you are right because if I search on the website it gives a totally different itinerary. I will fix that tomorrow once I get back to the office.

Do you have an idea why DL would show that buses do this extension?
I see the notice here for works on Bruggestraat in Staden.  Could that be the cause of an itinerary change?
https://www.delijn.be/nl/lijnen/5916/?richtingCode=0&showImportantAnnouncement=true&detourId=1232948

Kind regards.