Hello again and thanks for the responses.
Here is some more info that may help.
Since I have reset to factory defaults, Ethernet Backhaul Mode is still disabled. I never had it enabled before the reset either. WPS is currently enabled. WIFI settings are all currently at default.
I was using a switch between the RX-AX89X and the two RT-AX92U routers but have since moved them to connect directly to the RX-AX89X as I thought perhaps my switch was the problem. It isn't.
I've moved the ports for the two RT-AX92U routers on the RX-AX89X but no difference.
I had a look at the System log but I don't see anything that helps. Perhaps I just don't understand what's happening or what I'm reading in the logs. Here is a snip of the logs.
Dec 2 17:52:52 kernel: [30493.046587] wlan: [809:I:ANY] WLAN-NSS: VAP NSS ops initialized
Dec 2 17:52:52 kernel: [30493.047581] wlan: [809:I:ANY] VAP device ath0 created osifp: (b5513500) os_if: (b2588000)
Dec 2 17:52:53 kernel: [30494.465674] eth4: PHY Link up speed: 10
Dec 2 17:52:54 kernel: [30495.466076] sfp_phy_link_change_notify[165]:INFO:SFP+ running.
Dec 2 17:52:54 kernel: [30495.466097] sfp_read_status[125]:INFO:SFP+ link-down.
Dec 2 17:52:54 kernel: [30495.466418] eth0: PHY Link up speed: 1000
Dec 2 17:52:55 kernel: [30496.178955] wlan: [1665:I:ANY] ol_ath_set_config_param: 1654: set TXBF_SND_PERIOD: value 100 wmi_status 0
Dec 2 17:52:55 kernel: [30496.345710] wlan: [0:I:ANY] ol_ath_set_config_param: 2406: Disconnect_timeout value: 10
Dec 2 17:52:55 kernel: [30496.388567] wlan: [0:I:ANY] ol_ath_set_config_param: 2412: Reconfiguration_timeout value:60
Dec 2 17:52:55 kernel: [30496.465956] eth4: PHY Link is down
Dec 2 17:52:55 kernel: [30496.505849] eth2: PHY Link up speed: 100
Dec 2 17:52:56 kernel: [30497.112592] wlan: [2089:I:ANY] ol_ath_set_config_param: 1654: set TXBF_SND_PERIOD: value 100 wmi_status 0
Dec 2 17:52:56 kernel: [30497.291874] wlan: [0:I:ANY] ol_ath_set_config_param: 2406: Disconnect_timeout value: 10
Dec 2 17:52:56 kernel: [30497.339295] wlan: [0:I:ANY] ol_ath_set_config_param: 2412: Reconfiguration_timeout value:60
Dec 2 17:52:58 roamast: ROAMING Start...
Dec 2 17:52:58 kernel: [30499.865967] eth5: PHY Link up speed: 2500
Dec 2 17:53:01 kernel: [30502.015089] wlan: [2618:E:ANY] wlan_set_param: 756: wlan_set_param: ShortGI setting 1 not allowed
Dec 2 17:53:01 kernel: [30502.219659] wlan: [2645:I:ANY] wlan_set_param: 3031: HE MU BFER already set with this value =0
Dec 2 17:53:01 kernel: [30502.300801] wlan: [2654:I:ANY] ol_ath_vap_set_param: 2240: VDEV params:HE su_bfee:0|su_bfer:0|mu_bfee:0|mu_bfer:0|dl_muofdma:1|ul_muofdma:0|ul_mumimo:0|dl_muofdma_bfer:0
Dec 2 17:53:01 kernel: [30502.300824] wlan: [2654:I:ANY] ol_ath_vap_set_param: 2253: he_bf_cap=0x10
Dec 2 17:53:01 kernel: [30502.381043] wlan: [2663:I:ANY] wlan_set_param: 2897: HE UL MU OFDMA already set with this value =0
Dec 2 17:53:01 kernel: [30502.445882] wlan: [2672:I:ANY] wlan_set_param: 2878: HE UL MU MIMO already set with this value =0
Dec 2 17:53:01 kernel: [30502.457320] wlan: [2704:I:ANY] DES SSID SET=TheDeltaFlyer
Dec 2 17:53:01 kernel: [30502.659340] wlan: [2354:I:ANY] wlan_cfg80211_do_acs: 3717: vap-0(ath1):ACS Params
Dec 2 17:53:01 kernel: [30502.659354] wlan: [2354:I:ANY] wlan_cfg80211_do_acs: 3720: ht_enabled:1|ht40_enabled:1|vht_enabled:1|hw_mode:29|chwidth:40|
Dec 2 17:53:01 kernel: [30502.770735] wlan: [2774:E:ANY] wlan_set_param: 756: wlan_set_param: ShortGI setting 1 not allowed
Dec 2 17:53:02 kernel: [30502.972458] wlan: [2801:I:ANY] wlan_set_param: 3031: HE MU BFER already set with this value =0
Dec 2 17:53:02 kernel: [30503.035466] wlan: [2810:I:ANY] wlan_set_param: 2897: HE UL MU OFDMA already set with this value =0
Dec 2 17:53:02 kernel: [30503.094335] wlan: [2819:I:ANY] wlan_set_param: 2878: HE UL MU MIMO already set with this value =0
Dec 2 17:53:02 kernel: [30503.100594] wlan: [2823:I:ANY] DES SSID SET=TheDeltaFlyer
Dec 2 17:53:02 kernel: [30503.352944] wlan: [2354:I:ANY] wlan_cfg80211_do_acs: 3717: vap-1(ath0):ACS Params
Dec 2 17:53:02 kernel: [30503.352957] wlan: [2354:I:ANY] wlan_cfg80211_do_acs: 3720: ht_enabled:1|ht40_enabled:0|vht_enabled:1|hw_mode:30|chwidth:20|
Dec 2 17:53:02 rc_service: rc 2883:notify_rc restart_qca_lbd
Dec 2 17:53:02 rc_service: waitting "restart_wireless" via ...
Dec 2 17:53:02 mcastds: Entering evloopRun
Dec 2 17:53:02 rc_service: skip the event: start_cfgsync.
Dec 2 17:53:03 QCA LBD: daemon is stopped
Dec 2 17:53:03 QCA LBD: daemon is started
Dec 2 17:53:05 kernel: [30506.084326] wlan: [5811:I:ANY] vap-0(ath1): ACS result PCH 11 freq 2462, SCH 7 freq 2442, hw_mode 1 chwidth 40, vht_seg0 9 freq 2452, vht_seg1 0 freq 0
Dec 2 17:53:05 kernel: [30506.095774] wlan: [2354:I:ANY] DES SSID SET=TheDeltaFlyer
Dec 2 17:53:05 kernel: [30506.095789] wlan: [2354:I:ANY] wlan_cfg80211_chan_to_phymode: 1238: band:0 width: 2 channel_cfreq: 2462 center_freq1: 2452 chandef.center_freq2: 0 flags: 0
Dec 2 17:53:05 kernel: [30506.095887] wlan: [2354:I:ANY] ieee80211_ucfg_set_freq_internal: 553: Channel is configured already!!
Dec 2 17:53:05 kernel: [30506.096016] wlan: [0:I:ANY] ieee80211_disable_legacy_rates: 1609: ieee80211_disable_legacy_rates:MSG: User has disabled the previously set modified rate for beacon.
Dec 2 17:53:05 kernel: [30506.096021] wlan: [0:I:ANY] ieee80211_disable_legacy_rates: 1610: ieee80211_disable_legacy_rates:MSG: Hence going for the lowest available basic rate for beacon: 0 (Kbps)
Dec 2 17:53:05 kernel: [30506.199439] wlan: [0:I:CMN_MLME] vdev[0] ieee chan:11 freq:2462
Dec 2 17:53:05 kernel: [30506.199608] wlan: [0:E:FILS discovery] wlan_fd_set_valid_fd_period: 607: Invalid FD Interval : 0. Valid range is 20 - 100ms.
Dec 2 17:53:05 kernel: [30506.199608] FD Interval should be a factor of BI.
Dec 2 17:53:05 kernel: [30506.199608] Disabling FD
Dec 2 17:53:05 kernel: [30506.199688] wlan: [0:E:FILS discovery] wlan_fd_set_valid_fd_period: 607: Invalid FD Interval : 0. Valid range is 20 - 100ms.
Dec 2 17:53:05 kernel: [30506.199688] FD Interval should be a factor of BI.
Dec 2 17:53:05 kernel: [30506.199688] Disabling FD
Dec 2 17:53:05 kernel: [30506.199726] wlan: [0:I:ANY] vdev[0]: Mgt Rate:6000(kbps)
Dec 2 17:53:05 kernel: [30506.199740] wlan: [0:I:ANY] ol_ath_vap_set_param: 1452: Now supported CTRL RATE is : 6000 kbps and rate code : 0x10000003
Dec 2 17:53:05 kernel: [30506.199762] wlan: [0:I:ANY] vdev[0]: Mgt Rate:6000(kbps)
Dec 2 17:53:05 kernel: [30506.199773] wlan: [0:I:ANY] ol_ath_vap_set_param: 1452: Now supported CTRL RATE is : 6000 kbps and rate code : 0x10000003
Dec 2 17:53:06 kernel: [30506.987265] wlan: [2354:I:ANY] wlan_cfg80211_set_ap_chanwidth: 569: wlan_cfg80211_set_ap_chanwidth: freq:2462 hw_value:11 ch_width:1
Dec 2 17:53:10 kernel: [30511.333242] wlan: [5811:I:ANY] vap-1(ath0): ACS result PCH 149 freq 5745, SCH 157 freq 5785, hw_mode 2 chwidth 80, vht_seg0 155 freq 5775, vht_seg1 0 freq 0
Dec 2 17:53:10 kernel: [30511.350894] wlan: [2354:I:ANY] DES SSID SET=TheDeltaFlyer
Dec 2 17:53:10 kernel: [30511.350912] wlan: [2354:I:ANY] wlan_cfg80211_set_phymode: 1214: desired hw mode: 30
Dec 2 17:53:10 kernel: [30511.351053] wlan: [2354:I:ANY] ieee80211_ucfg_set_freq_internal: 553: Channel is configured already!!
Dec 2 17:53:10 kernel: [30511.351300] wlan: [0:I:dfs] WLAN_DEBUG_DFS_ALWAYS : dfs_set_current_channel_for_freq: 879: dfs_curchan already updated
Dec 2 17:53:10 kernel: [30511.682831] wlan: [0:I:CMN_MLME] vdev[1] ieee chan:149 freq:5745
Dec 2 17:53:10 kernel: [30511.683064] wlan: [0:E:FILS discovery] wlan_fd_set_valid_fd_period: 607: Invalid FD Interval : 0. Valid range is 20 - 100ms.
Dec 2 17:53:10 kernel: [30511.683064] FD Interval should be a factor of BI.
Dec 2 17:53:10 kernel: [30511.683064] Disabling FD
Dec 2 17:53:10 kernel: [30511.683179] wlan: [0:E:FILS discovery] wlan_fd_set_valid_fd_period: 607: Invalid FD Interval : 0. Valid range is 20 - 100ms.
Dec 2 17:53:10 kernel: [30511.683179] FD Interval should be a factor of BI.
Dec 2 17:53:10 kernel: [30511.683179] Disabling FD
Dec 2 17:53:10 kernel: [30511.683223] wlan: [0:I:ANY] vdev[1]: Mgt Rate:6000(kbps)
Dec 2 17:53:10 kernel: [30511.683256] wlan: [0:I:ANY] vdev[1]: Mgt Rate:6000(kbps)
Dec 2 17:53:12 kernel: [30513.476809] wlan: [4622:I:ANY] ol_ath_vap_set_param: 1334: Now supported MCAST RATE is 6000(kbps) and rate code: 0x10000003
Dec 2 17:53:12 kernel: [30513.507080] wlan: [4619:I:ANY] ol_ath_vap_set_param: 1334: Now supported MCAST RATE is 6000(kbps) and rate code: 0x10000003
Dec 2 17:53:12 roamast: ROAMING Start...
Dec 2 17:53:27 LBD: [ath1]: try to steer 88:66:5A:26:FC
8 by legacy
Dec 2 17:53:32 rc_service: watchdog 1708:notify_rc start_cfgsync
Dec 2 17:53:33 CFG_MNT: report band 1 unavailable channel list [52,56,60,64,100,104,108,112,116,120,124,128,132,136,140,144]
Dec 2 17:53:47 hostapd: ath0: STA f0:f6:c1:c8:36:64 IEEE 802.11: did not acknowledge authentication response
Dec 2 17:53:52 roamast: [EXAP]Deauth old sta in 0 0: 8A:96:AC:F9:33:35
Dec 2 17:53:52 roamast: ath1: disconnect weak signal strength station [8a:96:ac:f9:33:35]
Dec 2 17:54:00 roamast: ath1: remove client [8a:96:ac:f9:33:35] from monitor list
Dec 2 17:54:07 LBD: [ath1]: try to steer B8:3A:9D:B1:6E:A0 by legacy
Dec 2 17:54:18 roamast: [EXAP]Deauth old sta in 1 0: 3A:CE
A:1A:F9:9F
Dec 2 17:54:18 roamast: ath0: disconnect weak signal strength station [3a:ce:da:1a:f9:9f]
Dec 2 17:54:18 roamast: ath0: remove client [3a:ce:da:1a:f9:9f] from monitor list
Dec 2 17:54:20 hostapd: ath1: STA b8:3a:9d:b1:6e:a0 IEEE 802.11: did not acknowledge authentication response
Dec 2 17:54:56 LBD: [ath1]: try to steer F0:F6:C1:51:6F:9C by legacy
Dec 2 17:56:01 LBD: [ath1]: try to steer 8A:22:C7:20:23:2A by BTM
Any help or suggestions would be greatly appreciated.
Thanks everyone!