I have a SOAP web service that creates expense reports from our third party expense system and is supposed to be triggering a beforeSubmit user event script that doesn't seem to be actually triggering it. I've confirmed that web service is included in the deployment context, as well as the preference to trigger SuiteScript is checked under Web Services preferences. Is there anything else I should check to see why it wouldn't trigger in this context? The UE script triggers correctly when I open the created expense report via the UI, so I know the script itself is at least behaving correctly.

You can try looking at the soap request to make sure it does't override your company preferences