It's not just FBX. I converted an SFM model to OBJ+MTL, but the big prop did not show textures when remote rendered.

No error message, just did not transfer texture files.

Even more puzzling, works okay using a Poser primitive...

Lest due 'super-ambiance' of truck lights, I set the jello-cone a-glow, too...

These test-renders are local on CPU, local on twin GPUs, 'Network render' (CPU) on 'Box'...

Superfly, 14 pixel-samples, progressive, 64 bounces & buckets for CPU use, 1024 for GPUs.

Perhaps related, I've had a pair of FBX imports suddenly lose their textures to 'all black' in preview, but render okay, local or remote. I tried a bunch of stuff without success. Eventually saved scene as PZ3, closed Poser, grumbled, reloaded, and preview now okay...