[0.17.58] The train incorrectly calculates the route.

[MOHAPX]

The train travels from station A to station B.
If there is a station on the way of the train, then the train does not pass this way, but always takes a detour. But if there is no other way, then the train travels through the station. Why can't the train pass through station C if this route is shorter?
It is necessary to do it - if station C is turned off, then it would not interfere with the passage of the train.

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[boskid]

Not a Bug

When the path includes a train stop that is not the destination -> Add a penalty of 2000.

For pathfinding, because of penalty of train stop not in path, longer path is "better"

[valneq]

I think the idea behind the panalty for train stops is the following:

If your train takes a path where it traverses a train station, but for whatever reason has to stop along the way at some red signal, your train could possibly block the entrance/exit of that train station. As a consequence, another train that tries to get to that train station cannot access it -- and everything because your first train decided it was more important to save some fuel by taking a slightly shorter route.

[Loewchen]

As has been said, this is working exactly as it should. Check out the wiki for pathfinding details.

[MOHAPX]

If the station is turned off, the train will not go to it, therefore you can use this route for the train. Is not it logical?

[posila]

Disabled station may become enabled and another train might stop in it for undetermined length of time; so stations on path have fixed penalty for pathfinding regardless of their current state.

[mmmPI]

You can put a station on the long path too to equalize the penalty if the behavior is annoying you.