Subject: UpsertCatalogObject Not Applying category_id to New Items
Description:
Using the Square Catalog API (production environment), `UpsertCatalogObject` fails to apply `category_id` to new items, despite valid category IDs, correct payloads, and successful responses with version increments. This occurs for multiple category IDs (e.g., `IWF55NV4EXHZKRUSKHBBXVG2` and `NOLW4NHFNLXFFKHJ2LZ7EN6M`), both confirmed valid in the Dashboard.
Steps to Reproduce:
1. Send `UpsertCatalogObject` with `item_data` including `name`, `variations`, and `category_id` (e.g., `NOLW4NHFNLXFFKHJ2LZ7EN6M`).
2. API returns success, but `category_id` isn’t in `item_data` or `related_objects` (with `include_related_objects=True`).
3. Update with same payload; version increments, but category remains unset in retrievals and Dashboard.
Evidence:
- Initial payload: [Insert `Upsert payload` from 20:50:19,308]
- Upsert response: [Insert `Upserted item` from 20:50:19,593]
- Update payload: [Insert `Update payload` from 20:50:19,748]
- Update response: [Insert `Category updated successfully` from 20:50:20,073]
- Final retrieval: [Insert `Final retrieval` from 20:50:20,313]
- Dashboard: Item `GOA7HCHWCLKBGWDQHL7UQLY7` shows no category.
Expected Behavior:
`category_id` should be applied and visible in API retrievals and Dashboard.
Actual Behavior:
Category isn’t applied, despite successful API calls.
Please advise on a fix or workaround. Manual Dashboard assignment works, but API automation is critical for our workflow.
