Anonymous Would it matter if one is on 5GHz and the other is on 2.4GHz? I can't tell which of those either is on.
FWIW, I figured out how to check, and both Alexa and Roku ate on 5MHz
It doesn't make a difference if AP or Network Isolation is off. It might if it's on.
It definitely won't work if Client or Device Isolation is on.
Router manufacturers can call these options whatever they like, so look around.
Guest networks typically prevent clients from seeing one another, and you may or may not be able to disable that. It's up to the manufacturer.
Some people complain when they try to use their smartphone app as a remote control and it can't find the Roku. You could try the app, and if it works to control the Roku, this isn't your problem.
Anonymous My Roku Remote app works on my Android device.
I'm def not on guest network.
For me, using "The Roku App (Official)" from the play store, the remote can't find the Roku on the same SSID when isolation is enabled. When I turn that off and try again, the app sees it, connects to it, and works fine. I turn isolation back on, close and reopen the app, and it can't connect to the Roku.
If your Alexa device is connected to the same SSID as your phone, then this isolation feature is NOT your problem.
