Issued Material/PartWip

Would anyone know why a job material issued from inventory would not have a PartWip transaction? I have many materials, over 100 just on the one job I’m looking at, that have been issued from inventory using standard Issue Material. The JobMtl is issued complete but there’s no PartWip transaction for it… I have other materials on the same job and some even the same part number as the above where they do have PartWip transactions.

Thanks,
Chris