I've been fighting with this all day now and just can't get it to work. I've tried everything I could think of, my last approach was to create an invoice without any productlines and then re-retrieve the productlines from the sales order through a different class method of the workflow class. This class method would then revise the invoice with the product lines from the sales order. So basically split the invoice creation from the inventorylines creation. Nothing works on quick-edit. I can only get it to work on full-save. I'm kind of running out of ideas...
I did however, find this... Which maybe part of the problem?
I did however, find this... Which maybe part of the problem?