Not greyed out is to be expected, but “OFF”, hmm… 
I don’t like that it keeps resetting. We really need to know at which point this happens, if it got reset when locking the bootloader again this could have still bricked the phone.
Edit: Ok, after some digging, turns out the devinfo partition that gets flashed with the updated script stores that kind of information and the answer was in this forum all along 
Now we need to figure out why it doesn’t get saved