[2.0.73] Changing train group name causes memory loss in trains

[AutoChaos]

What did you do?
I noticed it when I changed the group name; all trains I had standing on the temporary station entered sleep mode (luckily, I added "empty cargo" to the parking interrupt).

What happened?
Trains that were currently on the temporary station forgot why they were there and defaulted to return to depo. The only good thing is that because of how interrupts work, they are STUCK there forever until there is only one type of item inside.

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More chaos.

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Even more

What did you expect to happen instead? It might be obvious to you, but do it anyway!
Trains to not forget that they are currently at the station where they were standing.

Does it happen always, once, or sometimes?
Consistently can repeat it.

Ok, conclusion. If your interrupt has "full cargo" to go to a deposit station, this bug will happen. If you use just "has cargo," it won't happen. Also, if the station train limit is just 1, it also won't happen; there must be a second incoming train.

This leads to a really annoying situation that can silently break a lot of things.
What I also noticed is that it seems to happen ONLY to trains that are already on station, those that are on the way do not have such issues.

Train Test.zip

(844.85 KiB) Downloaded 4 times

Save that shows example of it.

Steps to reproduce:
1. Have multiple trains on the same schedule.

01-25-2026, 22-21-24.png (2.72 MiB) Viewed 135 times

The train is currently sitting at the station "working"

2. Change the group name of ANY TRAIN while there is a train with the same schedule going to the same station. It's also valid to change a different change group name to the same name as those test trains. It will also cause the bug.

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3. The train, whose station is coming, a different train abandons its task and just leaves.

01-25-2026, 22-31-39.png (4.03 MiB) Viewed 135 times

Example on both stations train incoming, both abandon the task.

So far from testing:
- Train limits seem not matter. Limiting or unlimiting does not influence anything.
- Only seems to bug out at stations where there is a second train incoming. Without a second train going to the same station, it functions correctly.
- Don't even need to change the name, just Ctrl+click on the name causes this issue.
- Seems to only happen to trains where the cargo is not full.