Batch entries created in GMF tables (headers and lines) even if no costs exists in GL_item_cst table

When we run OPM pre-processor for productions transactions, transactions were picked up even if we have no cost in gl_item_cst.
After pre processor and create accounting, entries created are zero amount. .

Step to reproduce the issue :
1- We have one item without cost in gl_item_cst table
2- Production transactions were created : ressources (STEP) and WIP completion (CERT)
3- We run pre-processor for "Production" transactions with not checked the checkbox 'Post Transactions when No Item Cost'.
4- When I checked data in gmf_xla_extract_lines, I found lines for JLT's INV and WIP without cost.

What we expected : when no cost on an item in gl_item_cst table exist, program do not picked up transactions releated.