Oooh this is a disaster waiting to happen.
Chicken breast will get very mushy after holding that long. Any attempt to serve it will result in the breast falling apart.
Is it too late to change the menu? Is it a buffet, are you plating the chicken breast?
I cooked the sauerkraut then turned off the pot. Put the steaks in there and covered it for about 10 minutes. As you can see, turned out medium rare.
So quite good except I can't really take a bite of steak and sauerkraut at the same time.