Cant get collision between two ISM components

Hello.

I have an actor with 2 instaced static meshes.
They have 2 unique collision channels, 1 per ISM component and must collide only with other ISM component .
ISMs in both component sometimes get transform updates, and after them they must collide with another ISM and generate the OVL event.

But they dont. I dont know why, it is all ok with standart static meshes.

Update:
Checked collision between ISMs and other actor, it is OK. Problem only with collision between ISMs components in one actor.

Update 2: Collision between ISMs component and other actor is ok, only if another component is a capsule. Idk why.