Half of your objects in a nested map are down, but the top level map...

 Map status thresholds determine how the status of a map is calculated based on the status of its child objects. If you set the map status threshold to above 50%, it means that the map will be up if more than half of its child objects are up, regardless of the severity of the down objects. This can cause a situation where half of your objects in a nested map are down, but the top level map is up, because the top level map only considers the status of the nested maps, not the individual objects within them. To avoid this, you can lower the map status threshold to a value that reflects the desired level of availability for your network, or use custom map status thresholds to specify different values for different maps. References: Set map status thresholds in NPM, Create nested maps in NPM, How to map through a deeply nested array of objects?