Isaac sim - Controller is not accurate, and unable to reach the requested goals

I have looked and tested the movement of robotic arm in Isaac sim, I have looked into the DifferentialInverseKinematicsAction written in env, I have tried both ways, absolute position controller and delta command controller. I feel the controller is not accurate and when we are using absolute pose. Am I only one facing the issue? Please help me with this.
Thank you in advance.