UE427-Chaos how to change Blueprint to Geometry Collection

When I create Chaos Fracture ,the Blueprint disappear in UE427-Chaos!

It’s a geometry collection of 1 mesh…
Did something go wrong somewhere?

Is there anything in the blueprint viewport?
Are you using the fracture editor?

Thanks, I think the blueprint viewport is right,I just try to geometry collection,after that began to use fracture,I found another problem ,the cache was wrong,anyway I gave up 4.27-chaos,now I have more and more issue in UE5 :rofl: