WiFi Problem Linksys E8450/Belkin RT3200

Installing and Using OpenWrt
1

So, I have Belkin RT3200 and installed OpenWrt 22.03.5 r20134-5f15225c1e.

I have also configured gaming pc as headless server and configured Sunshine game streaming on it. It is connected via ethernet to Belkin.

On the TV I have configured Amazon Firestick 4K and it is connected to 5GHz WiFi (2GHz and 5GHz SSIDs are separated). Moonlight is configured on Firestick for game streaming and "everything" is working perfectly until I connect bluetooth controller to Firestick.

For some reason, when I connect bluetooth controller (Tried DS4, Xbox, cheap noname...) WiFi drops out. But not on Firestick, globally WiFi disappears, like it is turned off on Belkin, I cant connect my phone, I mean, it cant find network, cant connect laptop, IoT devices are offline... then after ~5min it comes back again and everything is working, WiFi, streaming, controllers...
Note that during downtime, I can connect to Belkin via ethernet ports.
Also, both 2GHz and 5GHz bands are down.

Belkin is like 20m 1 wall and 1 celling from Firestick and Bluetooth controllers.

p.s. I dont need to do anything on Firestick, I just leave it on main screen, turn on bluetooth controller and that happens. So it is not related with game streaming, as I tried also with uninstalled app and factory Firestick...

What could it be?

EDIT:
What I can find strange in logs is this:

Wed Dec 20 17:25:06 2023 daemon.warn dnsmasq[1]: Maximum number of concurrent DNS queries reached (max: 150)
Wed Dec 20 17:25:41 2023 daemon.warn dnsmasq[1]: Maximum number of concurrent DNS queries reached (max: 150)
Wed Dec 20 17:25:47 2023 daemon.warn dnsmasq[1]: Maximum number of concurrent DNS queries reached (max: 150)
2

Looks like the Firestick is bringing the network down? Can you connect to the router by wire, and see if there are any messages on the logs when this happens?

3

Wireless becomes down only when I connect any bluetooth controller. Until that, it works perfectly.

I dont see anything funny in logs, except wan lost connectivity and wan up, reloading firewall etc.

Also, after further investigation, wifi is there, but internet is not working, like it does not route wan over wifi. For example, I can ping 8.8.8.8 from router ssh, and from ethernet connected pc, but cant ping it from any device connected via wireless.

That only happens for ~5 minutes after I connect bluetooth controller to firestick. I am really confused what is the problem here. Never had anything like that...

4

All I can think is that there is a bug on the Firestick, and for some reason it is spamming the wifi AP when a BT device is connected.

5

Found the problem.

Moonlight app version 12.0.1 and above causes DNS spam when closed, and sometimes during operation.

I will leave this info here if someone gets same problem as me. Version 12.0 works good and is not causing any DNS spam issue.

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