Particles in viewport will die on hit with a collision mesh - when rendered out to a video, they will pass right through!
Im am trying to render frames 320-500
You can see the particles in wireframe mode in the viewport when you select the emitter (Microshpere.005). They die when hitting the (hidden) mesh named "particle collision cell"
This is an animation for a press release going out in a few days, I need a way to resolve this ASAP, so that the particles stay inside the cell