This is normal, as long as your phasmid is still sitting in the branches. These animals rely on camouflage to protect themselves, and movement risks them being spotted by predators. When they do move, most sway back and forth whilst walking. This is behavioural camouflage, and makes them look like a leaf or twig being moved by the wind. Not moving much is also a good way to conserve energy. However, if your phasmid is stationary on the bottom of the enclosure, this can indicate that it is unwell, and may need some emergency measures to help it get back on its feet. Contact us at Minibeast Wildlife for help as soon as possible.