@ssinton
Sorry to hear about the connection issue you're running into. Have you tried contacting your ISP and having them adjust your router's settings to see if they can help resolve the issue? We'd recommend trying to configure a 5GHz only SSID and attempt to connect to it. You may also try using both automatic wireless channel selection, or choosing a specific, static wireless channel (such as 149) to see if this restores proper functionality. Your ISP can assist you in doing this.
Please feel free to PM me with your Roku account email address, the serial number of your Roku TV from Settings>System>About on your TV, and the make/model of wireless router you are using. I'll help take a closer look and see what other suggestions we can make.
Thanks!
Tanner
Tanner D.
Roku Community Manager