Expected Behaviour
When vehicle is stopped, over a cargo loader/unloader with stopped vehicles only selected, the train loads everything from the chest adjacent to the loader/unloader

Actual Behaviour
Nothing gets loaded onto the train, unless moving vehicles are allowed. If moving vehicles are allowed, it only picks up 2 items.
Reproduction Steps
Steps to reproduce the behaviour:

1. Build a simple line with 2 platforms.
2. Add a cargo loader with a chest under a platform
3. Add a cargo unloader with a chest under another platform
4. Place a stack of items in the loader's chest
5. Configure the loader to only work with stopped vehicles using a brush
6. Nothing comes to the chest by the unloader, nothing is picked up from the loader

Crash Report
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Screenshots
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Environment

• Minecraft Version: 1.20.1
• Installed Mods:
  

Additional Information
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Grouped with #586 for cargo improvements/rework