UE 5.5 Surface Collision Not Working

Development Asset Creation FX
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1

Hello, I downloaded UE 5.5 today. I use Sphere Mesh with Cloner and also apply curl noise force with effector.

I have 500 cloned spheres. Some of these hit surfaces, but some do not come into contact with the surface at all. I changed the iteration and grid size settings, but I couldn’t. Please help.

Here:

2

im having so many issues with cloner’s collisions. same in 5.4 :')