Might be good to isolate your crop problem bird to rule her out, or confirm, as the funky egg dropper...and more easily observe and treat her.It may be the same. I have seen the other brown egg layer pullet in the nest box and she lays a hard shell. I am not 100% sure tho.
I use a wire cage within the coop for a day or two....so you can closely monitor their intake of food and water, crop function(checking at night and in morning before providing more feed), and their poops. Feel their abdomen, from below vent to between legs, for squishy or hard swelling.
Best to put crate right in coop or run so bird is still 'with' the flock.
I like to use a fold-able wire dog crate (24"L x 18"W x 21"H) with smaller mesh(1x2) on bottom of crate under tray.
Then you can put tray underneath crate to better observe droppings without it being stepped in. If smaller mesh is carefully installed, tray can still be used inside crate.