How to properly recalc total weight/volume on ORDER RELEASE and SHIP UNIT

Summary:

Hi everyone,

We receive from external system new ORDER RELEASE LINE and SHIP UNIT LINE that we integrate through the REST API, unfortunately the total value on the ORDER RELEASE (weight and volume) does not automatically recalc when we add or delete a new line. The same goes with our Ship Units, when we add a new ship unit line or delete one, the total weight and volume does not recalculate.

How can we properly manage those case ?

We tried to do some custom agents but only the ORDER RELEASE object type does have an event "RELEASE LINE - ADDED OR DELETED", if we could have the same event on the ship unit for the lines we could have a workaround but we feels it is strange that value shown as "total" are not a sum.