Query works in UI, but returns 0 records from jira-client api when I include "updated" field

[Eric Jorgensen]

This query works (returns records) in BOTH the jira UI and from my jira-client (Typescript) code:

assignee = ejorgens

However, this other query that uses the updated field only works in the jira UI.  When I paste it into my code, it executes, but returns 0 records:

assignee = ejorgens AND updated >= '2024-08-15'

same result with:

updated >= '2024-08-15'

What could possibly cause this?