Smoke Sim rendering in Viewport but not in final render (2.8, Cycles)

Im trying to render a scene which contains a smoke simulation. It renders in the viewport but not in the final render (both in Cycles):

Things I’ve checked:

• Rendering is enabled in the outliner
• Smoke has volumetric material
• Gone through render settings (none indicate any function that would prevent the render)

To preview the final render I’ve set the samples to 16, but that wouldn’t cause this, would it?
The trees and grass are invisible in the viewport for performance reasons.