RAX45 Regularly drops wireless connections

My RAX45 router performs poorly and frequency drops wireless connections. I'm at my wits end with this device. Can anyone offer any suggestions on how I might be able to fix the device.

I have an RAX45 that I purchased from Costco on 2022-07-31.

The router is setup to run in access point mode. It is wired through a computer that serves as a gateway through a Netgear GS116 gigabit switch. The router supports about 12 other devices probably 6 concurrently at the most. It does not have any USB disks or other devices connected to it. It has only a single wired connection back to the GS116 switch.

I have several wired devices in the house and they are able to access the internet and other devices on the network just fine through the GS116 switch.

When I first installed the router it worked well. After about 8-10 weeks the performance became very poor. Power cycling would no longer restore the router's functionality.

I then updated the firmware on the router to the latest version (currently V1.0.11.112_2.0.77), did a factory reset and reconfigured the router; it worked well again for a short while. The router now regularly (every minute or so) drops connections on all wireless devices (android phones, windows and linux computers) it is connected to. Power cycling the router does not alleviate the problem. Additionally, the administrative web interface is very slow and often cannot be connected to even over a hardwired connection.

I have tried disabling all the various wireless features and changing the channels used by the device with no improvement.

The fact that the admin web interface cannot be loaded combined with the logged disconnection reason (DISASSOC_AP_BUSY) leads me to believe that the router is being overloaded for some reason.

One of my Debian machines produces the following log entries:

Nov 16 20:03:25 lappy-386dx kernel: wlp2s0: disassociated from 6c:cd:d6:f8:39:2c (Reason: 5=DISASSOC_AP_BUSY)
Nov 16 20:03:27 lappy-386dx kernel: wlp2s0: authenticate with 6c:cd:d6:f8:39:2c
Nov 16 20:03:27 lappy-386dx kernel: wlp2s0: bad VHT capabilities, disabling VHT
Nov 16 20:03:27 lappy-386dx kernel: wlp2s0: Invalid HE elem, Disable HE
Nov 16 20:03:27 lappy-386dx kernel: wlp2s0: 80 MHz not supported, disabling VHT
Nov 16 20:03:27 lappy-386dx kernel: wlp2s0: send auth to 6c:cd:d6:f8:39:2c (try 1/3)
Nov 16 20:03:27 lappy-386dx kernel: wlp2s0: 6c:cd:d6:f8:39:2c denied authentication (status 33)
Nov 16 20:03:43 lappy-386dx kernel: wlp2s0: authenticate with 6c:cd:d6:f8:39:2c
Nov 16 20:03:43 lappy-386dx kernel: wlp2s0: bad VHT capabilities, disabling VHT
Nov 16 20:03:43 lappy-386dx kernel: wlp2s0: Invalid HE elem, Disable HE
Nov 16 20:03:43 lappy-386dx kernel: wlp2s0: 80 MHz not supported, disabling VHT
Nov 16 20:03:43 lappy-386dx kernel: wlp2s0: send auth to 6c:cd:d6:f8:39:2c (try 1/3)
Nov 16 20:03:43 lappy-386dx kernel: wlp2s0: authenticated
Nov 16 20:03:43 lappy-386dx kernel: wlp2s0: associate with 6c:cd:d6:f8:39:2c (try 1/3)
Nov 16 20:03:43 lappy-386dx kernel: wlp2s0: RX AssocResp from 6c:cd:d6:f8:39:2c (capab=0x411 status=0 aid=40)
Nov 16 20:03:44 lappy-386dx kernel: wlp2s0: associated
Nov 16 20:03:44 lappy-386dx kernel: wlp2s0: Limiting TX power to 27 (27 - 0) dBm as advertised by 6c:cd:d6:f8:39:2c