Some of alerts that are passing the threshold and generating an alarm. However, they are not clearing and returning to the green (good) status. They are generating a false positive to the monitored panels.
If there is at least one alert gray status(not reporting) in summary, then the summary alert will show up as RED.
You can easily fix this behavior by removing from the summary alert, the alerts that are gray (not reporting). In the example above, we must remove the "App_Prepago_limeaiv04_ART" alert.