I am synchronously using the CopySheet API to make a copy of a sheet. This API responds with a sheet summary, which itself includes the copied sheet's id. Immediately when that sheet is copied, I call the GetSheet API to get the full details of the new sheet. Mostly this works, but a moderate number of times, I will get a 404 Not Found response to my invocation of the GetSheet API, indicating that the sheet is not fully baked or not fully available yet, or perhaps there is some caching of sheets available on the Smartsheet side and the cache isn't busted? It is very odd behavior. Is this expected?