You're trying to argue something with me that I'm not arguing. I know it was removed. I know it helped you in the past. You don't know it does what you think it does simply because it helped with your Roku 3. Apparently I'm going to have to prove you're wrong (or maybe you're right; we'll see). You seem to think I'm arguing with you; I'm not. If any Roku can use a different channel for the remote than for its WiFi connection, that's news to me. I sincerely think you're wrong there. My original statement was simply that it doesn't just "use the same channel as the highest strength 5GHz (my Wi-Fi router!) in the area!". That's demonstrably wrong (as I demonstrated).
Same issue here on new 2019 Ultra... Have to unplug Roku or disable rf to fix massive wifi channel interference. Such a glaring design flaw. Love the interface but might have to return if not fixed.
I have this problem too but the opposite. I may have noticed some minor issues on my wifi connected computers, etc. but some Roku remotes will not work unless you are VERY close to the actual unit. This is the case only with SOME of the Roku and Roku remote combinations. I switched 2 of the Roku's and one works with its remote in the den and the other does not. Both work downstairs on the patio. Its the Ultra that has the issue upstairs. I also have 2 Roku 3's, a Roku TV and 2 Roku Stick+'s. TV is IR, no problem. The sticks are behind the TV's right in front of the remote, no problem. The Roku 3's and Ultra are in a central rack downstairs. The Ultra works only with its remote when the remote is downstairs. The Roku 3's work with their remotes from either upstairs or downstairs. Additionally, I bought a new remote to use on one of the Roku 3's from upstairs and it has the same issue as the Ultra/ Ultra remote even though the other Roku 3 remote works perfectly right next to the new remote. The new remote is paired and will work if you get very close to the Roku. Frustrating.