Would you be able to post a closer pic of her bum? I think I can see where a feather or two may have been plucked, but not sure. Those are common areas to get plucked at while roosting. She does look like she has some feathers that get chomped at.
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Where is she at in the pecking order? It would be a bit early to molt, but if they’re sick or something they might go into a stress molt. Have you checked well for lice and mites? Anyone else getting feathers plucked?
Also if she is still laying, it is unlikely she is molting. Sorry to say, but she might have a flock mate plucking her at night on the roost.