OK, that was important. If it had changed to RED-RED-GREEN, that would be much easier to solve.
So this now falls into the category of “This should not have happened”. So I have to consider the possibilities. At this point, it doesn’t really matter if the SSID is broadcast or not. It should not stay RED-GREEN-GREEN for more than three minutes. So given that is indeed the case, the problem might lie in components outside of my purview. Without a doubt this is rare, so it probably has something to do with local conditions. There are so many combinations it’s impossible to say.
Now there are several ways to proceed, depending on how much you can and want to do.
If you know how to access the client tables in your router, see if the IoTaWatt is connected. It should have hostname iotawatt. I doubt this is the case, but would be interesting if so.
If you want to open the device up, remove the SD card, and mount it on your computer, the file /iotawatt/iotamsgs.txt may contain clues. You could post that and I’ll see what I can see.
You might try turning off the device that you initially used to connect to the AP and see if the AP appears on a scan with another device, while your wifi is switched off.
Another option is to could contact OEM and try to return it for either reflashing and testing, or replacement.