That should work! I believe your document Fill Trigger here is currently Form Completion. You can change that to Changed Field Value for specific control.
The setting here takes precedence over the latest email setup you added which currently isn’t really tied to the document (you are not attaching the document in the said email action).
You can either Set the Fill Trigger here to No trigger and then set an email action on the correct trigger (field value changed) and ensure document is attached in this action. or,
Set the Fill Trigger here (in the document itself) to Changed Field Value.