It rebooted and bootlooped a bit, but I eventually got it to boot back into android... I'll report back if it happens again.
I experienced this same issue. Booting into Fastboot and Rebooting from there corrected this issue for me. It has not happened since with several restarts. I also reflashed TWRP 2.6.3.0 and all is working fine... Knock on wood.
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