Constraints not working at Order Line level, till line gets saved.

Hi Team - I have a question to share with you about OM Constraints. I created a simple constraint at OM Order line level, to avoid updating Price List field.

While testing, I surprinsingly discovered that the constraint is getting active and working after the OM line get saved. What means that, you can start completing the line, populating every field, and also you are allowed in my case, to update or delete the fields affected with the constraint (on mi example the price list) before saving, with no action taken by the defined logic.

Just after you saved the line, that´s the moment when the constraint gets enabled and controlling those changes.