The DoD drug testing program was calibrated in a fashion that normal ingestion of poppy seeds would not be detected but, according to the memo, there's a new strain of poppy seed that is detectible. So out of an abundance of caution and until they can figure out improved drug testing procedures, they've asked service members to abstain from poppy seed products.
If someone text positive for opiates they’re going to test positive for other drugs like THC or ampetamine that are not confused with poppy seed alkaloids.