I have a basic scene with 1 collision plane that sits under 3 cloth soft bodies, animated for 50 frames. It looks like the top plane collides at frame 14 with the 2 spheres where they were located in frame 1.
Things I've tried:
- Bake All Dynamics
- With and without cache of the same name
- In-memory vs On Disk Cache
- Order of the Collision + Cloth modifiers
- With and without a Collision Collection
The scale of the items are: plane (4m x 2m x 0.05m), spheres (0.3m radius). This is a brand new scene and default settings. I've adjusted the collision distances to be more accurate and used loop cut on the plane to give it some basic cloth shape as it collides. Otherwise, nothing weird or unusual.