Automation set with "0 days" won't trigger immediately because "0 days" aligns the due date with creation. For instance, if a trip created at 11 AM has its automation set to trigger at 0 days at 9 AM, the trigger time is missed, and subsequent triggers won't execute since the due date has passed. Updating the trigger to 1 day post-creation ensures actions are captured in the first 24 hours. Immediate trigger enhancements are planned for future releases.