[U-Boot] UUID returning 00000000 in 2019.07

[Adam Ford]

I have two different MMC devices and both return 0's for their UUID's

i.MX6 Logic # part list mmc 1

Partition Map for MMC device 1  --   Partition Type: DOS

Part Start Sector Num Sectors UUID Type
  1 2048      32768      00000000-01 0c Boot
  2 34816      655360    00000000-02 83
i.MX6 Logic # part list mmc 0

Partition Map for MMC device 0  --   Partition Type: DOS

Part Start Sector Num Sectors UUID Type
  1 2048      32768      00000000-01 0c Boot
  2 34816

>From Linux, it's clear they have unique UUID's

# blkid
/dev/mmcblk0: PTTYPE="dos"
/dev/mmcblk0p1: SEC_TYPE="msdos" LABEL="boot" UUID="880C-488C" TYPE="vfat"
/dev/mmcblk0p2: LABEL="rootfs"
UUID="03177169-5175-4b80-b271-1400b6407f93" TYPE="ext4"
/dev/mmcblk1: PTTYPE="dos"
/dev/mmcblk1p1: SEC_TYPE="msdos" LABEL="boot" UUID="BEF5-8B62" TYPE="vfat"
/dev/mmcblk1p2: LABEL="rootfs"
UUID="e7a80a96-752e-49b0-a1b9-292199bf20a4" TYPE="ext4"
#

I have tried setting a variety of UUID related flags in the menuconfig
yet I still get 0's

CONFIG_CMD_UUID=y
CONFIG_CMD_FS_UUID=y
CONFIG_PARTITION_UUIDS=y
CONFIG_SPL_PARTITION_UUIDS=y
CONFIG_LIB_UUID=y

I am wondering if I'm missing something somewhere in my defconfig.
Does anyone have any suggestions?

Thank you,

adam