problem when using ros2 launch isaac_ros_visual_slam isaac_ros_visual_slam_realsense.launch.py

Thank you for your excellent work.

I am using a Jetson Orin with a D435i for visual SLAM. The kit works well when I run the quick start launch file:

ros2 launch isaac_ros_examples isaac_ros_examples.launch.py
launch_fragments:=realsense_stereo_rect,visual_slam
interface_specs_file:=${ISAAC_ROS_WS}/isaac_ros_assets/isaac_ros_visual_slam/quickstart_interface_specs.json
base_frame:=camera_link
camera_optical_frames:="['camera_infra1_optical_frame', 'camera_infra2_optical_frame']"

However, when I try to use the following launch file:

ros2 launch isaac_ros_visual_slam isaac_ros_visual_slam_realsense.launch.py

it gets stuck.

Any advice would be greatly appreciated.