It's common for some jade plant cuttings to develop slower than others. If the non-shooting cutting is healthy and firm, it might just be focusing on root growth first. Ensure it's not overwatered and has enough indirect sunlight. A bit of patience is key, as sometimes these cuttings take time to show visible growth. If it looks unhealthy after a while, it might not be viable, but if it's still firm and intact, there's a good chance it'll eventually start growing.
