Freight Lines are dropping at Autoinvoice interface

Hi,

I am importing Invoices with lines of type Line and Freight from Order management, the invoices get created with only lines of type line even though:

1- At the Transaction source (Autoinvoice Option) I have reject invoice if Invalid line

2- I have Grouping rule DEFAULT populated at the Transaction source which group using INTERFACE_LINE_ATTRIBUTE1 (Sales Order) which is same for all lines

Thanks for Help!

Fifi