I am having the same problem with Roku Express 4k+. All my other devices work fine. Did you ever figure out what needed to change to fix this issue with Roku devices? Is the problem with TP-Link or Roku?
Hey Jganio,
I was not able to nail down anything concrete. What I did was move some of the Roku devices onto an older Asus AC router to see if the same problem occurred. No drops or Unknown states on the Asus. After a few updates to my AX11000 the problem seemed to work itself out. Based on my testing, I would be willing to bet TP-Link was the issue. Even during the unknown issue, my devices still worked. I have a few TP-Link routers and TBH, I am slowly losing trust in TP-Link. Most of my issues seem to have started when TP-Link added Mesh capabilities to their firmware. Asus had similar growing pains during their Mesh implementations as well.
Success!... I played around with a few parameters on the router ... turned off Mesh, used different SSID's for 2.4 and 5ghz, set it up as an access point, updated the code and rebooted it multiple times... one or more of them did the trick and I can now connect with my Roku Express 4k+!
Something to consider with the TP-Link AX11000 is its DFS channel capability. Depending on which firmware version you are using, capable of using channels 52-144. Roku cannot see or use DFS channels, so you must use channels 36-48 (low band) or 149-165 (high band) in the 5ghz wireless settings for your Roku device and router to see each other.
Since you have two (2) 5 ghz bands available to you on that router, perhaps consider assigning one of them a manual channel within the non-DFS channels mentioned above. The 5ghz-1 is for the lower band, 5ghz-2 is for the upper band. If you leave both of these 5ghz bands set on "Auto" under the Wireless Channels, you increase the chances that the router will select a DFS channel and your Roku devices will disconnect/be unable to connect on the 5ghz band.
Certainly can leave one 5ghz band DFS compatible if you need/want that feature. These changes are found under the Advanced Tab. (Advanced/Wireless/Wireless Settings)
Click on images to enlarge.
