Order Management extension is not working when schedule ship date is changed

Summary:

We have a requirement to update the line EFF with first schedule ship date and for this purpose we have defined below order management extension whenever scheduled ship date is updated either manually or through API. But this seems to be not working as i have tried below groovy in both save and before submission request.

I am also doubting whether extension are triggered only when new revision is created or even when changes are made in date.

Please suggest on this.

Content (please ensure you mask any confidential information):

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