That’s interesting.
My single rabbit tends to do this a bit once I get home or am going to bed. (He lives in the bedroom) The hay pile often looks the way it did when I topped it up before work. Then he’ll get stuck into it once Im there. It’s a pattern Ive seen but I don’t think it’s like that always with him. There is always a bit of hay strewn around the floor too, so im sure he eats a bit of that when im absent as I see him do when I am there.
I rather think they stay in “alert mode” -Not super alert, they can be somewhat relaxed, and even lightly nap, but like they’ll stay in “sentinel” position when it’s just them. My boy tends to sit in bun loaf postion at the end of the bed. I usually find him there when I get home. When Im home during the day, he tends to bun loaf on the floor out in the open or go under the bed.
I also see him do more flop-naps where they really zone out when I go to bed but keep lamp on and read. Almost as if Im taking up the sentinel roll for a while.
Is her food available in the one spot? Maybe you could put hay in some other places close to where she spends most her time and hope she nibbles on that? What about leaving a tv or radio on so she feels like is still about?