Precision 5860 doesn't recognize bootable SD card on the SD card reader slot.

Media-card reader One SD-card slot (front) on the new Precision 5860 XL Tower doesn't recognize the bootable media. When I insert an SD bootable media it doesn't show up in the one time boot menu to select. However, the SD card is detected in the File explorer. Raised case with Dell support and haven't been able to get any resolution.