How to reproduce:
in 253C version
1.Login in with "GardenWorld Admin"
2.Create a Shipment aproval workflow for Shipment.
3.Create new Shipment,Save it
After step 3: All Shipment field changed to Read only,
and can't create new shipment line.
check the activity workflow's status is suspended.
After step 3: All Shipment field can be modify.
and can create shipment line.