If you turned off auto switching you should se a 2.4ghz and a 5ghz network on your system.
Do you have alot of devices connected to it?
If you do I wonder if it has the same issues Hydros has if you use your main router with everything connected to it, it drops wifi alot and fails to connect but once I added its own network everything is 100% rock solid and my light is rock solid as well.
If you have alot of devices on the network i would suggest getting that $20 router and make its own network for the light and I will bet it connects perfectly