The drone aircraft suddenly decelerates or stops for no reason

Check the following and see if the issue is resolved after each step:

• Make sure there is no dirt or other debris around the stereo cameras or infrared range sensors. If there is, gently wipe it clean with a soft dry cloth. The sensors may not work if there are back-lighting or strong light sources nearby or low-light environments.
  
  Note: For the locations of the stereo cameras and infrared range sensors, refer to the Help Guide.
• Calibrate the stereo cameras.