Logging Difference Between Designer And SQL Agent Package Executions

After fine-tuning my package logging, I built a query against SYSDTSLOG9 that uses the combination of the OnPreExecute events and any subsequent event for each task to build a nice view of a package in progress, including the duration of each event. (Running tasks would have a row with a NULL EndTime.)

When running the package within the Designer, everything works as expected. Events are logged at the task level and everything bubbles-up to the package level.

However, when I run the package from SQL Agent (using the SSIS job step), none of my OnPreExecute or sub-component events are written. That is, I only get package-level OnInformation, OnPostExecute and OnError events.

This means when the job/package is executing, I can't directly see which steps are currently in progress nor can I get a duration for each step once it's completed. This will be very disconcerting for my teammates who will have to help support this at some point.

Any idea how or why there would be a change in behavior between these two execution methods?

Thanks in advance for any help. Until then, banging my head against the wall...
Tim