Yep, my NH rental kicked down to the red area at 3am for 4 hours.
I cancelled it and resubmitted it. The new rental has also been stuck for 4 hours.

WBF1, thanks for the 2048 diff tip. That fixed the stuck NH rental on kano after restarting the rental.
Kano, I wonder why this changed? The difficulty on the workers management page?  AAAHHH!