I am having a Red Eye feeding issue as well.
Initially got a female (Stitch) from petco and she taught us how set-up to a frog's liking. 3 weeks later we got Eric from the same store, same enclosure at the store, same vendor supplies the store just these two came from separate hatchings. With that in mind we did not quarantine much (at all). We have found though that Eric doesn't eat much and isn't an aggressive hunter at all. Stitch, however goes crazy on crickets and gets a round belly. We separated Eric in a keeper and fed him small crickets setting up a camera to catch his habits. He ate 3 small to medium crickets. Later we fed both of them in their "home" and set up the camera, Stitch ate all but two small crickets.

I do have another whole 10 gallon viv that I could set up to separate them at night for feeding, or do I just separate them from about 9-11 pm for feeding then return them home?

I'm not concerned about Stitch, she eats great and seems very healthy. Eric however seems a little slow.

Also, Stitch we are sure is full grown female, Eric is Still juvenile to small male in size, a little over half Stitch's size.

Thank you,
Tyler