Reflash the HK one that you had. I had similar results trying to flash an Australian version - not sure why. Instead of going back to MI7 I flashed HK MK1 version using the RDLV method - now on MK1, rooted, Knox on 0x0.
Will work on getting to Aust CSC later when I have had the phone more than 2 weeks and willing to risk warranty.
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