I have a bad snacking habit myself. :gig
No need to let them range 3x a day.
Maybe just at the end of the day so urge to roost gets them back to the coop?
Normal for a molting bird to be a bit lethargic and to isolate a bit too.
As long as she's eating/drinking/pooping/moving around OK, I'd not worry.
What all and how exactly are you feeding?
Some extra protein can be good during molting time.