How did you perform the flashing?, did you do it manually or used manufacturing tool?
I have done it manually, because i have now only Ubuntu on my PC.
dmitrii@dmitrii-Predator-G3-605:~/test/android_5_freescale/image_to_flash$ sudo dd if=u-boot-imx6qsabreauto_sd.imx of=/dev/sdb bs=1K seek=1; sync
407+0 records in
407+0 records out
416768 bytes (417 kB) copied, 0,816086 s, 511 kB/s
dmitrii@dmitrii-Predator-G3-605:~/test/android_5_freescale/image_to_flash$ sudo dd if=boot-imx6q.img of=/dev/sdb1; sync
14844+1 records in
14844+1 records out
7600384 bytes (7,6 MB) copied, 1,79037 s, 4,2 MB/s
dmitrii@dmitrii-Predator-G3-605:~/test/android_5_freescale/image_to_flash$ sudo dd if=system.img of=/dev/sdb5; sync
737240+0 records in
737240+0 records out
377466880 bytes (377 MB) copied, 38,9548 s, 9,7 MB/s
dmitrii@dmitrii-Predator-G3-605:~/test/android_5_freescale/image_to_flash$ sudo dd if=recovery.img of=/dev/sdb2; sync
15916+1 records in
15916+1 records out
8149248 bytes (8,1 MB) copied, 2,66373 s, 3,1 MB/s