What does "[Warning] [carb.gym.plugin] useGpu is set, forcing single scene (0 subscenes)" mean?

When running python train.py task=FrankaCabinet I get this print:

[Warning] [carb.gym.plugin] useGpu is set, forcing single scene (0 subscenes)

I understand that this is a warning but I am wondering what it actually means. I can’t see how using a GPU would trigger a warning for this library, so the issue must be related to the use of a “single scene”. Does this mean we lose performance if have a single scene?

Other posts have had some similar warnings (or the exact one) but without addressing what the warning means.

Thanks!