You may not be seeing some line items coming over to production because fees, for example, are not transferred from the estimate. This is because fees are not part of the budget expense for the actual production. The production window is mainly where you’re waiting for receipts for line items, but you can add additional fees as overages within production as needed.
If some production costs or line items are not transferring from production to your invoice, it has to do with receipts that are added during the production phase. The production feature is designed so that only the line item production costs with associated receipts (actuals) will transfer to your invoice stage.