How can I stop my static meshes from jittering

I’m trying to make a coin pusher, but all of the coins are jittering everywhere & pinging out of each other.
I’ve tried turning off PCM in project settings, using CCD, mass, messing with dampening & physical materials, but nothing seems to change how they jitter.

They also seem to glitch through the pusher sometimes & fall through.
jitter coins

Howdy Flyin_Guy, thank you for posting your question with the cool gif.

Your concern looks strangely like Z-Fighting. How are the collisions of your static meshes? Does the collision adequately cover the integrity of your coin mesh? I can reproduce this concern on my end as well and I have noticed that if I make my coins a little thicker, the Z-Fighting and clipping ceases.

I hope this helps.

So I’ve managed to stabilize it a bit by scaling everything up, but it’s still a little shaky. The collision is simple, made & imported with the UCX_ name from blender.
jitter coins2
collision
collision2