A subject really. All was well for about a month but now my 3rd unit is not on the network. Its light is solid green but apparently not on the mesh with the other two devices. I unplugged it and moved it really close to another unit and then it came back but when I moved it back to its old position it's missing again. The light is solid green once again too. Nothing has changed re: room layout in my house in the last month. Any ideas what's gone wrong? Why is the light green if it's not working properly!?