RT-BE96U - WiFi Stops Randomly

[CaptainBDSC]

Hello, first time caller, long time fan... haha...

I recently purchased a refurbed RT-BE96U on Amazon for a "cheap" $370. YAY! (I got it because my RT-AXE7800 got partially bricked during a firmware update. Sending that in for physical repair.)

I set it up as new; meaning I did not try to use the CFG file to import all my previous settings, etc.
I am using the regular firmware: 3.0.0.6.102_39112

Everything seemed fine, I updated the firmware to the latest. It all seemed fine for several hours. Then, boom all the WiFi died. A reboot fixed it, and it stayed online for about 2 days. Crashed again... again a reboot fixed it.

I compared the logs prior to my rebooting, and found this as a similar log entry:

"acsd: acs_update_status(1497): acs get chanspec failed ret code: -19" - from the 1st WiFi crash
"acsd: acs_update_status(1497): acs get chanspec failed ret code: -16" - from the 2nd WiFi crash

Doing a google search, Gemini says is talking about Automatic Channel Selection. Is this accurate, and could it make the whole WiFi system crash?
If I should choose my own channels, which WiFi scanner app is legit to use to try and figure it out? (The apps I have tried, I guess are made for a different country since the channels suggested and the channels I can actually select on Asus routers don't exactly align????)

Could there still be something wrong with the hardware, hench the reason is was sent back and "refurbished"? I have an 11-month warranty thru Amazon so, I guess I can send it back if I should.

 

[Tech9]

whole WiFi system crash?

All the bands disappear or just one of them? Select manually the standard 2.4GHz Ch.6 @20MHz, 5GHz Ch.36 @80MHz, 6GHz whatever you use there - test again. If it crashes again after some time - return the router.

which WiFi scanner app is legit

Almost none since they show the environment from a client prospective and don't show channel available bandwidth. You can run the router on Auto for some time, observe and fix the channels per band it uses more often.

 

[CaptainBDSC]

All the bands disappear or just one of them? Select manually the standard 2.4GHz Ch.6 @20MHz, 5GHz Ch.36 @80MHz, 6GHz whatever you use there - test again. If it crashes again after some time - return the router.

Thank you for replying!
OK. So you are suggesting fixing the channels and bandwidths and see if it stays online?

I am pretty sure all bands crashed as my IoT WiFi network also crashed and most of the things on it can only use 2.4GHz, and all of my laptops and phones seem to prefer 5GHz which were also disconnected. (Oddly, when I was poking around the Web GUI during the WiFi being down, the router itself didn't seem to think anything had been disconnected, as near as I could tell, but I didn't try pinging any of my WiFi devices through the router itself.)

 

[Tech9]

So you are suggesting fixing the channels and see if it stays online?

Since I know nothing about your environment and settings - Yes.