Exception filling window for RimWorld.Dialog_FormCaravan: System.NullReferenceException

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Describe the bug
When reforming a caravan and adding bodies to the transported cargo, their mass is not added to the mass of transported items in the caravan calculator.

To Reproduce

1. Create a new settlement.
2. Send a caravan.
3. At the destination, set up a temporary camp.
4. Kill several animals.
5. Open the world map.
6. Reform caravan.
7. Add the animal bodies to the cargo.
8. Check that the final mass in the calculator remains unchanged.

Screenshots

After departure, the caravan's weight is recalculated correctly.

Additional context
When creating a caravan in a home settlement, everything works correctly and this bug does not appear.

Initializing new game with mods:

• brrainz.harmony
• Ludeon.RimWorld
• Ludeon.RimWorld.Royalty
• Ludeon.RimWorld.Ideology
• Ludeon.RimWorld.Biotech
• Ludeon.RimWorld.Anomaly
• Ludeon.RimWorld.Odyssey
• SmashPhil.VehicleFramework

RimWorld.Dialog_FormCaravan.txt