I never experienced a single issue on both of the two RT-BE92Us that I got, this was the cheapest and best upgrade I did and getting LAN like speeds wirelessly.
I haven't experienced a single issue with this firmware but neither did I have any issues earlier.
Here is how I set mine up:
I have 2 of them, one is in my office upstairs and the 2nd one is downstairs connected via a LAN cable.
I setup the main router first, never enabled AiProtection or QoS (and never will). During the initial setup phase, I also created the suggest IoT network, that's how my wireless printer connects for better compatibility. After setting up the initial connection, I turned on MLO then clicked on MLO Fronthaul as I didn't want to make a separate MLO network, I prefer simplicity, one SSDID for everything and one for IoT devices. So yes, SmartConnect is also enabled.
I then setup the built in VPN which is how my VoiP phone connects to the internet as IP Phones are banned in Dubai.
Finally, I went to AiMesh, settings, clicked on wired backhaul, then added the second router.
Not a single disconnection or issue and the speeds are insane.
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