Using experience event dataset on AJO landing pa

I have a question regarding AJO Forms and Experience Event datasets.

When an AJO Form writes data to an XDM Experience Event dataset through a Form Preset, should the platform automatically generate the mandatory root fields _id and timestamp?

If yes, is there any specific configuration required to enable this behavior?

If not, what is the recommended approach for customers to populate these mandatory XDM fields, considering that the Form Designer does not appear to provide a mechanism to dynamically generate values for _id or timestamp?

Currently, data ingestion into my streaming Experience Event dataset is failing with the error:

"_id is missing"

At the same time, I can see the Adobe OOTB web.formFilledOut event being generated successfully with both _id and timestamp populated.

Could you please clarify whether this is expected behavior, a configuration issue, or a known limitation when using AJO Forms with custom Experience Event datasets?