[2.0.42] Inserter in certain position indicates it can take from cargo wagon, but doesn't

[chipthefood]

What did you do?
Place an inserter to remove items from a cargo wagon on a curve.

What happened?
The inserter indicated with the extra outline on the cargo wagon that it will interact with it, but does not insert or remove.

What did you expect to happen instead? It might be obvious to you, but do it anyway!
It should not show the extra outline on the cargo wagon if it cannot actually interact with it.

Does it happen always, once, or sometimes?
Always, at the same placement regardless of rotation. The affected placement one is the one highlighted by the ghost cursor.

Screenshot_20250329_112809.png (1.88 MiB) Viewed 247 times

To Reproduce

• Place two straight rail pieces, and then a curve.
• Place station on furthest straight rail.
• Place locomotive and cargo wagon, ensure it is actually at the station on automatic (i.e. put in fuel, add station to schedule, call train to station).
• Place inserter on the inside of the curve, flush with the straight rail.

I didn't happen to stumble upon any other placements of it that affects it like this.

[tinker9]

This seems very similar to viewtopic.php?t=127165 , which is marked as a minor issue.

If it helps, sometimes a workaround is:
1. cut or delete the inserter
2. wait until it is gone
3. undo the cut/insert

I think this only works for some inserter/rail placements, and only when the train is in the correct position at the stop.

[chipthefood]

Thanks! I actually searched for related things but not well enough since I didn't it.

That actually does seem to be related in the exact opposite relation, because it works if copy/pasted but not if placed manually.

That inserter works if copy and pasted. It also works if the chest is hand placed before the inserter. I can't test if a belt works there because it doesn't fit, only a chest. If the inserter is placed before a chest, it will never work. Copy and paste seems to work but since I have EE and that's instant not sure if the ordering matters much.

I thought the bug was visual but now I can confirm it works for copy/paste I'm not too sure if it's visual or a bug or whatever. Either way it's a completely minor problem.

The simple answer is, this is an edge case that we don't have any nice solution for except "don't build inserters around curved rails"

you cant make me

Screenshot_20250330_043719.png (3.44 MiB) Viewed 181 times