[Question] Why does calling self.render() in Isaac Lab cause CPU memory usage to increase?

[kldst]

I’m running Isaac Lab(2.0.0) Isaacsim(4.5.0) in headless training mode with PhysX LiDAR enabled.
To make the LiDAR sensor update, I need to call self.render().

However, when I do this, I notice that CPU memory usage keeps increasing over time.
If I don’t call self.render(), the LiDAR sensor does not update with each simulation step.

Why does self.render() in headless mode cause CPU memory to grow?

Is there a recommended way to properly release memory or update LiDAR sensors without this issue?

 def step(self, actions):
        self.render()
        return super().step(actions)