Routing and costs not optimal

🚧 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/routing-and-costs-not-optimal/
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I drive with my BMW i3 from Riegelsberg (Saarland/Germany) to Gailingen (BW) and ABRP suggests this route:
https://abetterrouteplanner.com/?plan_uuid=be63a48e-0b7a-45e4-b6bd-ed55896869e5

362 km, 4:48 h and 27,8€ charging costs with the cards I own.

Look at the following route:
https://maps.app.goo.gl/DWwkN73SaM1g4D2c6

I charge my car once at "Air de Brumath" near Strasbourg for about 9€ (15 kWh at 0,6 €/kWh) pay 7€ toll to Sanef for using French highways.
I drive 301 km in about 4:00 h plus 25 min time for charging.

My route is faster it is shorter and costs are way better. Add-on: using a french autoroute is much more relaxed than driving on German autobahn.

I didn't switch on anything in ABRP to disallow crossing frontiers paying road tolls etc.

What's wrong here?