Most likely cause
Official material explicitly links settlement production of rations and camping supplies to the next expedition. The exact Camp Fire placement and recovery rules remain unverified.
Primary lead: Official Steam description
Quick fix · Expedition route order
Symptom: The party has to return before reaching the intended room because its expedition supplies or recovery loop collapses.

Legacy test path—reconfirm every label and control in the EA build.
The relevant expedition stat recovers and the supply count decreases by the displayed amount. Do not infer recovery from the camp animation alone.
Why this answer is still partial
Official copy links settlement-made rations and camping supplies to expeditions.
Official development updates establish the settlement-to-expedition production loop.
