About baud rate of micrortps and ros2 topics

I am trying to test the ros2 topic “/fmu/vehicle_local_position/out”.

I found that the subscriber can get the data from this topic when the baud rate is 1000000 but it cannot get any data from this topic when the baud rate is 460800.

For “/fmu/sensor_combined/out”, it can always get data no matter the baud rate is 1000000 or 460800.

I want to get the heading, lat_ref and lon_ref data from the “/fmu/vehicle_local_position/out” but my new device is not working with baud rate of 1000000.