I have multiple Electrons installed at various locations in Georgia. Recently, 3 electrons went offline at the same time around 4 pm on August 28. I tried to debug on Particle Console. I can not Ping those 3 devices, but they all show green in the health check. What can go wrong? Is it a Cellular issue? When the customer reset the electron, the LED is RED. When the electron is not connected to the Particle cloud, the firmware makes LED to RED.