Recently my Samsung Frame TV has been dropping connection to my Deco network. I am able to see and select the Wifi network, but it is unable to connect. 

I have tried factory resetting the TV, rebooting the network, forgetting the network on the TV, but it is still not able to connect. 

The TV has a static IP, I have set DNS to 1.1.1.1, I have turned off beam forming, fast roaming. I have tried everything but it has randomly stopped working after working for 1.5 years.

The only way I can get the TV to connect is if I turn on and connect to the guest network instead of the main network. 

Please let me know if you have any ideas to resolve this issue.