Since I haven't seen activity here for a while, I'm going to assume the problem was resolved. However, in the event it hasn't been, here is a clip from my RT-AX86U's system log this morning from the latest firmware:
I did not notice any of the reported messages reported above.
Jun 24 22:36:56 WATCHDOG: [FAUPGRADE][auto_firmware_check

7952)]do webs_update
Jun 24 22:36:56 WATCHDOG: [FAUPGRADE][auto_firmware_check

7970)]retrieve firmware information
Jun 24 22:36:56 WATCHDOG: [FAUPGRADE][auto_firmware_check

7973)]user in use
Jun 24 22:37:26 WATCHDOG: [FAUPGRADE][auto_firmware_check

7952)]do webs_update
Jun 24 22:37:26 WATCHDOG: [FAUPGRADE][auto_firmware_check

7970)]retrieve firmware information
Jun 24 22:37:26 WATCHDOG: [FAUPGRADE][auto_firmware_check

7973)]user in use
Jun 24 22:39:30 kernel: eth3 (Ext switch port: 2) (Logical Port: 10) (phyId: a) Link DOWN.
Jun 24 22:40:13 kernel: eth3 (Ext switch port: 2) (Logical Port: 10) (phyId: a) Link Up at 1000 mbps full duplex
Jun 24 22:40:33 wlceventd: wlceventd_proc_event(685): eth7: Auth C0:95:6D:6F:91:9A, status: Successful (0), rssi:0
Jun 24 22:40:33 wlceventd: wlceventd_proc_event(722): eth7: Assoc C0:95:6D:6F:91:9A, status: Successful (0), rssi:-52
Jun 24 22:40:38 wlceventd: wlceventd_proc_event(662): eth7: Disassoc C0:95:6D:6F:91:9A, status: 0, reason: Disassociated because sending station is leaving (or has left) BSS (8), rssi:0
Jun 24 22:40:38 wlceventd: wlceventd_proc_event(662): eth7: Disassoc C0:95:6D:6F:91:9A, status: 0, reason: Disassociated because sending station is leaving (or has left) BSS (8), rssi:0
Jun 24 23:00:20 disk_monitor: Got SIGALRM...
Jun 25 03:42:01 ahs: [read_json]Update ahs JSON file.
Jun 25 03:42:01 get_ext_phy_id: 0/1/0/0
Jun 25 03:42:04 ahs: [self_healing]pattern_index-[9].
Jun 25 03:42:04 ahs: [self_healing]re_pattern-[get_ext_phy_id:].
Jun 25 03:42:04 ahs: [self_healing]take action-[store_state].
Jun 25 03:49:00 wlceventd: wlceventd_proc_event(645): eth7: Deauth_ind 14:C1:4E:58:A0:CD, status: 0, reason: Deauthenticated because sending station is leaving (or has left) IBSS or ESS (3), rssi:0
Jun 25 03:49:21 wlceventd: wlceventd_proc_event(685): eth7: Auth 14:C1:4E:58:A0:CD, status: Successful (0), rssi:0
Jun 25 03:49:21 wlceventd: wlceventd_proc_event(722): eth7: Assoc 14:C1:4E:58:A0:CD, status: Successful (0), rssi:-36
Jun 25 03:53:26 WATCHDOG: [FAUPGRADE][auto_firmware_check

7952)]do webs_update
Jun 25 03:53:36 WATCHDOG: [FAUPGRADE][auto_firmware_check

7970)]retrieve firmware information
Jun 25 03:53:36 WATCHDOG: [FAUPGRADE][auto_firmware_check

7985)]fimrware update check first time
Jun 25 03:53:36 WATCHDOG: [FAUPGRADE][auto_firmware_check

8016)]no need to upgrade firmware