Typeahead User Custom Field Not Working as a Report Prompt

Hi Everyone,

I’m looking for some clarification regarding the behavior of Typeahead User custom fields in Workfront reports.

We have a Task report with a custom Typeahead User field named Assigned Channel Strategist.

Here’s what we’ve observed:

The Assigned Channel Strategist field displays correctly in the report column.
The Typeahead User field is not available when configuring a report prompt.
As a workaround, we added the corresponding Assigned Channel Strategist ID field to both the report and the prompt.
When entering the User ID in the prompt, Workfront correctly resolves and displays the corresponding user’s name.
However, after selecting the user and running the report, no records are returned, even though the report contains multiple records with the same Assigned Channel Strategist ID.
We also verified that the field values and User IDs match correctly on the underlying task records.

My questions are:

Is this expected behavior for Typeahead User custom fields in Workfront report prompts?
Are Typeahead User custom fields officially supported for report prompts?
Is there any Adobe documentation or Experience League article that explains this behavior?
If this is a known limitation, is there a recommended workaround for filtering reports by a Typeahead User custom field?

Any guidance or documentation would be greatly appreciated.

Thank you!