Why can’t the Xiaomi Robot Vacuum H40 reach the designated area?

If the Xiaomi Robot Vacuum H40 can’t reach the designated area, please refer to the following steps:
1. Check for physical obstacles such as closed doors, furniture, or high thresholds that may block the robot’s path;
2. Open the Mi Home/Xiaomi Home APP and review the map list;
3. Delete similar or duplicate maps to avoid confusion caused by re-localization to the wrong map;
4. Ensure the correct map is selected and actively in use before assigning a cleaning task;
5. Reset and remap the area if the current map appears inaccurate or if the robot frequently gets lost;
6. Update the robot’s firmware through the Mi Home/Xiaomi Home APP to ensure optimal navigation performance;
7. Restart the robot and try assigning the designated area again to verify if the issue is resolved.