[SPZ2-5940] [1.0.0-alpha5-rc2] Trains unload preview can be wrong in certain situations

[mint raptor]

See attached save file. I should have the camera focused on the problematic train station. I have set the blue route of the train so that only W shape should ever be unloaded, but it is reporting that both R and W shape could be unloaded.
I was setting up train lines. Had both red and blue line share one section of track, extended blue line to a deadend (so W shape don't end up unloading at the red station), deleted that deadend, quickly brought the blue line to this station.
(I don't think it is 100% reproducible unfortunately.)
I tried save and reload the save and still seeing same issue.

[rare mountain]

Thank you for reporting this bug! Our team will review your report soon.
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[rare mountain]

💾 6

Version

1.0.0-alpha5-rc2

Scenario

Manufacture Mode - Regular

Seed

98705

Research

76%

Buildings

152,508

Completed

No

1. [SPZ2-5897] — 👀 72% similar

Shape prediction does not update at vortex when changing rail route configuration from the same unloader into another
To Do • Priority: Highest • Fix: 1.0 Release [1.0.0]

Shape Previews at The Vortex do not update when the player changes a Train Route configuration to redirect a train from one Shape Wagon Unloader to a different one. When two differently colored rail routes unload into the same Shape Wagon Unloader, both Shape Previews appear correctly on the Conveyor Belts. However, after rerouting one train to a different Shape Wagon Unloader, the Shape Previews on the Conveyor Belts leading into The Vortex fail to reflect the change. The expected behavior i...

2. [SPZ2-5832] — 👀 70% similar

Train predictions aren't recalculated after rerouting a train
To Do • Priority: High • Fix: 1.0 Release [1.0.0]

Train shape previews are not recalculated after rerouting a train. When a train's route is changed to a new direction, the shape previews for the new route are not updated to reflect the change. The expected behavior is that shape previews should automatically update after a train is rerouted. This was observed in Classic Mode on the Regular scenario.

3. [SPZ2-5304] — 👀 55% similar

Train predictions are accounting for all loaders when the shapes will never get to the unloader they are indicated on
Done • Priority: High • Fix: None • Resolution: Missing Feature

Train Shape Previews show all loaded Shapes on every unloader even when those Shapes will never reach certain unloaders due to earlier drop-offs. This occurs when a Train picks up Shapes, drops them off, picks up different Shapes, and drops those off - all unloaders display predictions for all loaded Shapes regardless of the actual route. The user expected predictions to accurately reflect which Shapes would reach which unloaders, but this was closed as working as intended since precise predi...

4. [SPZ2-5303] — 👀 50% similar

Prediction for trains that have more wagons than the amount of loaders will be showing for the wrong unloader
Done • Priority: Highest • Fix: 1.0 Bugfixes before Feature Freeze • Resolution: Done

When a Train has more Wagons than Shape Wagon Loaders at a Train Station, the Shape Previews display on the wrong Shape Wagon Unloader. The previews appear on the first unloader instead of the last one that will actually receive the shapes. This occurs in Classic Mode when setting up a station where the number of wagons exceeds the number of loaders. The previews should indicate which unloader will receive shapes based on the train configuration and loading pattern.

5. [SPZ2-3114] — 👀 45% similar

Belt predictions are still incorrect when loading savegames
Done • Priority: High • Fix: 4 - Early Access • Game: 0.0.1 • Resolution: Done

Shape Previews on Conveyor Belts display incorrectly when loading Savegames. The issue specifically affects complex factories with high connectivity between Space Platforms, where the topological order calculator breaks down. In the reported case, no Shape Previews were coming from a Blue Square Space Platform. The bug was caused by Space Belt Merges not considering all output possibilities and issues with the topological order calculation for highly connected platform networks. Multiple fixe...

6. [SPZ2-2994] — 👀 44% similar

Shape Predictions do not work consistently in large savegame
Done • Priority: High • Fix: 4 - Early Access • Game: 0.0.0-alpha23 • Resolution: Done

Shape Previews do not work consistently in large Savegames. When loading an affected Savegame and navigating to various Space Platforms, attempting to create Splits on Conveyor Belts often fails to display Shape Previews. In some cases, predictions appear only after repeatedly replacing or connecting Conveyor Belts. The issue is particularly noticeable in highly connected factories with many Structures. Expected behavior is that Shape Previews should consistently appear when drawing Split Con...

Found 6 similar reports • Searched 3,194 reports • Use /check-duplicates to recheck

[limber socket]

Someone made a thread close enough I'd take a hit if I made a "copy" of the thread. If you build your unloading station in the MIDDLE of a track, with loading stations AFTER the unloading station, the preview doesnt fire correctly.

Look at the top of the image, the only working preview is the shape I loaded at the beginning, the others are loaded at the end of the track

[rare mountain]

🎫 Many thanks for reporting this issue! We have created an internal ticket for further investigation and will keep you updated. The internal ticket ID is SPZ2-5940 for reference. If you want to provide further information, just comment on this thread.

[SPZ2-5940] [1.0.0-alpha5-rc2] Trains unload preview can be wrong in certain situations

[woven holly]

Problem was the wait stop. They are causing issues with the train predictions. I had something like this happening a few weeks ago but couldn't figure it out because it was a complicated save.
Thank you so much for the save file 🙂

[fossil musk]

this still seems to be happening for me in beta2, beta3, and now beta4 - I have train lines that are only shipping pure stars or pure squares, but the shape preview on the train unloader alternates between the actual shapes, and full circles