Robotplaceholder issue in jazzy

[cwrx777]

I want to use RobotPlaceholder and use gz_spawn_model to put the robot on the waypoint.

In humble version of traffic editor, we usually add spawn_robot_name and spawn_robot_type on the waypoint, and set spawn_robot_type to RobotPlaceholder.
In jazzy version, i set spawn_robot_type to Open-RMF/RobotPlaceholder.
e.g.

After I built the map and launched the sim, gz crashed.

2nd question:
in gazebo classic, we can use gazebo_ros spawn_entity reference_frame to spawn an object on waypoint with spawn_robot_name set to the value specified in reference_frame. How can it be done in jazzy?