The system hangs at the "Crtl P" screen to enter intel me setup, not at main bios POST.
I found a solution that works if anyone else has this issue. Rather than using the option to disable Intel Management Engine (ME), I re-enabled Intel ME and disabled the "Manageabily Feature" for Intel AMT.
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Its a workaround rather than a bug fix, I reported this to our local FAE, so hopefully the Bios team will address this issue in the next release.