Can you post a few photos of her so we can see what she looks like?I felt the crop today, it was much harder than it was last time I checked (maybe 2 months ago). I can still try the crop bra, but will it actually help? For reference, the crop is the size of a grapefruit and the hardness of an inflated basketball.
For some reason I can't find your previous post(s) about her, so can you tell us what you did to treat her the first time around?
If she is still roaming around with the flock, she is filling up on...whatever. So you may need to cage her within the coop/run so you can "control" what she's eating to get this resolved. A kennel works well, she can still be with the flock and they can all see each other.
I would try the crop bra, but read the link that Azygous gave you - good information there. But a bra is not going to fix everything, you still need to treat whatever crop issue she has going on - blowing up like a grapefruit - does it feel like it has air in it?
I'm sure she will chime back in, but I would start by getting some coconut oil into her, massage - then provide her with water only for the day or most of the day, massaging several times. Any food that she gets needs to be soft - wet mushy feed and a small amount of soft cooked eggs for a "treat" - not much. Ideally put her on puppy pads so you can get a good look at her poop and so she's not eating bedding.