All versions: given two instances of the same component, where both are axis-aligned, and where the component definition contains axis-aligned faces, faces can randomly disappear from the rendering.
InfoThis is a rarely-seen engine bug, which is being worked on. It has already been fixed once in internal betas, but the fix had bad side effects, and had to be rolled back.
WorkaroundsThere are three known workarounds:
1. Apply a slight rotation to affected component instances.
2. Explode and group one of the components, or use Make Unique, in order to prevent the geometry from being instanced.
3. Disable instances entirely (available in the RS plugin only; see Scene Manager > Output > Export > Instances).