I recently set up a Deco x60 mesh system with 2 nodes upstairs and one node on the main floor and set up as a router. Typically have 20-25 devices connected and have never had an issue with any of the devices with the exception of my LG smart tv which is located on the main floor about 5 feet away from the node. 

The tv is not automatically connecting to the wifi network. I have to manually find the ssid from the list of available connections and enter the wifi pass every time I turn on my TV. It's incredibly annoying. Once I enter the wifi password, I've noticed that the TV connects to one of the nodes upstairs (the main one) and not to the node located 5 feet away.

Also, fast roaming is off, FYI

Any suggestions for how to fix this issue?