Hey!
The BCS just takes the ticket rating from Omsi.
The ticket rating is calculated by Omsi. And yes! When you dont give any changes, even if you dont have to because they give you the right price, Omsi says: hey they give no change so the ticket rating drops a few %.
I think BCS can’t do anything about this problem. This will sadly never get fixed because the Omsi main game, will never get an update anymore.