Best route is not shown

🚧 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/best-route-is-not-shown/
———————————————————————————
Hi,
I found two examples where the best route is not shown, not even as an alternative. (I can't find any settings to get these best routes).
Please check if there's a bug in ABRP's algorithm (or if I'm doing something wrong).
The routes are in Germany

1. Verden (Aller) -> Sittensen
   Best route is 57km in 38-39 minutes on the A27, then along Posthausen and finally on the A1. (See primary route on Google Maps or Waze).
   ABRP suggests A1/A27: 40 min for 74km, which means 17km more and 1-2 min longer journey.
2. Tesla SuC Bad Oeynhausen -> Bremen
   ABRP suggests the Autobahn along either Hannover or Osnabrück, both more than 190km. There's a direct route with only 120km (about 2/3 of the distance and less than 60% of the consumption) with almost the same driving time as the motorway.

Could you please improve ABRP to give the best routes? Thank you!