Run the isaac_ros_ess instance, but there is no output in the visualization window

Hello, I strictly followed the ESS Quickstart Guide (isaac_ros_ess — isaac_ros_docs documentation) to run the DNN Stereo Depth example with Isaac Sim. While the pipeline completes without any errors, the visualization window only displays a blank background with no disparity/depth output.

**System Info:**
- **OS:** `Ubuntu 22.04 LTS`
- **ROS Distro:** `Humble`
- **Docker Image:** `nvcr.io/nvidia/isaac/ros                  x86_64-ros2_humble_8c9a28b31750e484966dd84d2291531b`

**Hardware:**
- **GPU:** `NVIDIA RTX 3060 (Driver Version: 550.120        CUDA Version: 12.4)`
- **CPU:** `AMD Ryzen 5 3600 6-Core Processor`
- run ros bag