Are you running your mission on the simulator ?
The tracking sections are not available with the simulator (cv@tracking@proposals and cv@tracking@box).
What is the difference between the sections that are and are not available in the simulator?
Are there any other sections that cannot be used in the simulator?
The cv@tracking@proposals and cv@tracking@box telemetry sections are the only telemetry sections that are not available on the simulator. This is due to the hardware: the visual tracking service uses the drone’s neural network (only available on a physical drone). All the other telemetry sections are available on the drone and on the simulator.
Now you understand why the cv@tracking@proposals and cv@tracking@box telemetry sections are the only telemetry sections that cannot be used in a simulation environment!