extern controller can not find the robot

[233Xiaowu]

Describe the Bug
When I use project webots_ros2_mavic, I want to be able to modify the sensor subitem of the robot itself to fulfil my other perceptual needs. But when I convert the robot to base node, the extern controller can't find the Mavic robot, and when I reset simulation, the transformed robot is missing.

Expected behavior
I am able to modify the robot's children and am able to read the relevant data in real time via ros2 communication

Affected Packages
List of affected packages:

• webots_ros2_mavic
• webots_ros2_control
• webots_ros2_driver

Screenshots
If applicable, add screenshots to help explain your problem.