Invoice Workbench - Distributions Missing until Validation

Dear Communtity,

My company is in the process of upgrading from Oracle 11i to R12.  We have run into an issue (or feature) not sure which one in R12.  When we create an invoice header in the invoice workbench and then navigate down to invoice lines and create a line with full accounting and save the record, if we do not navigate down to the distribution level the distribution is not created until we validate the invoice.  Once the invoice is validated then the distribution is created. 

If we create the line with full accounting and then navigate down to distributions then the distribution is created.