Perhaps the disconnect is happening because Brume is trying to connect to the origin SSID WiFi, for WAN; yet the Ethernet cable is connected from another router or origin into the WAN port?

root@30uter_0z:~# logread
Fri Dec 23 23:23:24 2022 kern.info kernel: [  431.278402] br-lan: port 4(wlan0) entered blocking state
Fri Dec 23 23:23:24 2022 kern.info kernel: [  431.284021] br-lan: port 4(wlan0) entered disabled state
Fri Dec 23 23:23:24 2022 kern.info kernel: [  431.290032] device wlan0 entered promiscuous mode
Fri Dec 23 23:23:24 2022 kern.info kernel: [  431.295050] br-lan: port 4(wlan0) entered blocking state
Fri Dec 23 23:23:24 2022 kern.info kernel: [  431.300503] br-lan: port 4(wlan0) entered forwarding state
Fri Dec 23 23:23:24 2022 daemon.notice hostapd: wlan0: interface state UNINITIALIZED->HT_SCAN
Fri Dec 23 23:23:25 2022 kern.info kernel: [  431.803096] br-lan: port 4(wlan0) entered disabled state
Fri Dec 23 23:23:25 2022 daemon.err hostapd: Using interface wlan0 with hwaddr 00:c0:ca:a6:82:78 and ssid "XXXXX"
Fri Dec 23 23:23:25 2022 kern.info kernel: [  432.172519] br-lan: port 4(wlan0) entered blocking state
Fri Dec 23 23:23:25 2022 kern.info kernel: [  432.178099] br-lan: port 4(wlan0) entered forwarding state
Fri Dec 23 23:23:25 2022 daemon.notice hostapd: wlan0: interface state HT_SCAN->ENABLED
Fri Dec 23 23:23:25 2022 daemon.notice hostapd: wlan0: AP-ENABLED
Fri Dec 23 23:23:25 2022 daemon.notice netifd: Network device 'wlan0' link is up
Fri Dec 23 23:23:26 2022 daemon.info hostapd: wlan0: STA XX:XX:XX:XX:XX:XX IEEE 802.11: associated
Fri Dec 23 23:23:26 2022 daemon.notice hostapd: wlan0: AP-STA-CONNECTED e4:b3:18:2d:0d:fc
Fri Dec 23 23:23:26 2022 daemon.info hostapd: wlan0: STA XX:XX:XX:XX:XX:XX RADIUS: starting accounting session CE51791EFF0DCDB8
Fri Dec 23 23:23:26 2022 daemon.info hostapd: wlan0: STA  XX:XX:XX:XX:XX:XX WPA: pairwise key handshake completed (RSN)
Fri Dec 23 23:23:28 2022 daemon.info dnsmasq-dhcp[3660]: DHCPDISCOVER(br-lan) 172.21.15.123 e4:b3:18:2d:0d:fc
Fri Dec 23 23:23:28 2022 daemon.info dnsmasq-dhcp[3660]: DHCPOFFER(br-lan) 172.21.15.123 e4:b3:18:2d:0d:fc
Fri Dec 23 23:23:28 2022 daemon.info dnsmasq-dhcp[3660]: DHCPREQUEST(br-lan) 172.21.15.123 e4:b3:18:2d:0d:fc
Fri Dec 23 23:23:28 2022 daemon.info dnsmasq-dhcp[3660]: DHCPACK(br-lan) 172.21.15.123 e4:b3:18:2d:0d:fc mx1
Fri Dec 23 23:24:34 2022 user.info : [ 2910] gl-wifi-core>> bIsStaEnabled=1
Fri Dec 23 23:24:35 2022 daemon.notice hostapd: wlan0: interface state ENABLED->DISABLED
Fri Dec 23 23:24:35 2022 daemon.notice hostapd: wlan0: AP-STA-DISCONNECTED XX:XX:XX:XX:XX:XX
Fri Dec 23 23:24:35 2022 daemon.notice hostapd: wlan0: AP-DISABLED
Fri Dec 23 23:24:35 2022 daemon.notice hostapd: wlan0: CTRL-EVENT-TERMINATING
Fri Dec 23 23:24:35 2022 daemon.notice hostapd: nl80211: deinit ifname=wlan0 disabled_11b_rates=0
Fri Dec 23 23:24:35 2022 kern.info kernel: [  501.809710] device wlan0 left promiscuous mode
Fri Dec 23 23:24:35 2022 kern.info kernel: [  501.814804] br-lan: port 4(wlan0) entered disabled state
Fri Dec 23 23:24:35 2022 daemon.notice netifd: bridge 'br-lan' link is down
Fri Dec 23 23:24:35 2022 daemon.notice netifd: Interface 'lan' has link connectivity loss
Fri Dec 23 23:24:35 2022 daemon.notice netifd: Network device 'wlan0' link is down
Fri Dec 23 23:24:37 2022 daemon.notice netifd: radio0 (18700): sh: out of range
Fri Dec 23 23:24:37 2022 daemon.notice wpa_supplicant[18769]: Successfully initialized wpa_supplicant
Fri Dec 23 23:24:37 2022 daemon.notice netifd: radio0 (18700): command failed: No such device (-19)
Fri Dec 23 23:24:37 2022 user.notice mac80211: Failed command: iw phy phy0 interface add wlan0 type __ap
Fri Dec 23 23:24:37 2022 daemon.err hostapd: Configuration file: /var/run/hostapd-phy0.conf
Fri Dec 23 23:24:37 2022 daemon.notice netifd: radio0 (18700): sh: /usr/bin/ovs-vsctl: not found
Fri Dec 23 23:24:37 2022 daemon.notice netifd: radio0 (18700): sh: /usr/bin/ovs-vsctl: not found
Fri Dec 23 23:24:37 2022 kern.info kernel: [  504.123930] br-lan: port 4(wlan0) entered blocking state
Fri Dec 23 23:24:37 2022 kern.info kernel: [  504.129270] br-lan: port 4(wlan0) entered disabled state
Fri Dec 23 23:24:37 2022 daemon.notice hostapd: wlan0: interface state UNINITIALIZED->HT_SCAN
Fri Dec 23 23:24:37 2022 kern.info kernel: [  504.135195] device wlan0 entered promiscuous mode
Fri Dec 23 23:24:37 2022 daemon.notice netifd: Interface 'wwan' is enabled
Fri Dec 23 23:24:38 2022 daemon.err hostapd: Using interface wlan0 with hwaddr 00:c0:ca:a6:82:78 and ssid "XXXXX"
Fri Dec 23 23:24:38 2022 daemon.notice wpa_supplicant[18782]: wlan1: Trying to associate with f4:92:bf:af:f4:ea (SSID='YYYYY' freq=5240 MHz)
Fri Dec 23 23:24:38 2022 kern.warn kernel: [  504.859100] ------------[ cut here ]------------
Fri Dec 23 23:24:38 2022 kern.warn kernel: [  504.863910] WARNING: CPU: 0 PID: 4560 at cfg80211_ch_switch_notify+0x4c/0x23c8 [cfg80211]
Fri Dec 23 23:24:38 2022 kern.warn kernel: [  504.872390] Modules linked in: 8811au 8812au 8821cu pppoe ppp_async option usb_wwan sierra pppox ppp_mppe ppp_generic nf_nat_pptp nf_conntrack_pptp iptable_nat ipt_REJECT ipt_MASQUERADE ebtable_nat ebtable_filter ebtable_broute xt_time xt_tcpudp xt_tcpmss xt_statistic xt_state xt_recent xt_nat xt_multiport xt_mark xt_mac xt_limit xt_length xt_hl xt_helper xt_hashlimit xt_ecn xt_dscp xt_conntrack xt_connmark xt_connlimit xt_connbytes xt_comment xt_TCPMSS xt_REDIRECT xt_LOG xt_IPMARK xt_HL xt_FLOWOFFLOAD xt_DSCP xt_CT xt_CLASSIFY wireguard usbserial ts_fsm ts_bm slhc sierra_net rndis_host nf_reject_ipv4 nf_nat_tftp nf_nat_snmp_basic nf_nat_sip nf_nat_redirect nf_nat_proto_gre nf_nat_masquerade_ipv4 nf_nat_irc nf_conntrack_ipv4 nf_nat_ipv4 nf_nat_h323 nf_nat_ftp nf_nat_amanda nf_log_ipv4 nf_flow_table_hw
Fri Dec 23 23:24:38 2022 kern.warn kernel: [  504.945897]  nf_flow_table nf_defrag_ipv4 nf_conntrack_tftp nf_conntrack_snmp nf_conntrack_sip nf_conntrack_rtcache nf_conntrack_proto_gre nf_conntrack_netlink nf_conntrack_irc nf_conntrack_h323 nf_conntrack_ftp nf_conntrack_broadcast ts_kmp nf_conntrack_amanda macvlan iptable_raw iptable_mangle iptable_filter ipt_ECN ipheth ip_tables huawei_cdc_ncm ebtables ebt_vlan ebt_stp ebt_redirect ebt_pkttype ebt_mark_m ebt_mark ebt_limit ebt_among ebt_802_3 crc_ccitt compat_xtables cdc_ncm cdc_ether cdc_acm xt_u32 8192eu cfg80211 compat sch_teql sch_sfq sch_red sch_prio sch_pie sch_multiq sch_gred sch_fq sch_dsmark sch_codel sch_cbq em_text em_nbyte em_meta em_cmp act_simple act_police act_pedit act_ipt act_gact act_csum libcrc32c act_connmark sch_tbf sch_ingress sch_htb sch_hfsc em_u32 cls_u32 cls_tcindex
Fri Dec 23 23:24:38 2022 kern.warn kernel: [  505.019225]  cls_route cls_matchall cls_fw cls_flow cls_basic act_skbedit act_mirred usb_f_ecm g_ether usb_f_rndis u_ether libcomposite xt_set ip_set_list_set ip_set_hash_netportnet ip_set_hash_netport ip_set_hash_netnet ip_set_hash_netiface ip_set_hash_net ip_set_hash_mac ip_set_hash_ipportnet ip_set_hash_ipportip ip_set_hash_ipport ip_set_hash_ipmark ip_set_hash_ip ip_set_bitmap_port ip_set_bitmap_ipmac ip_set_bitmap_ip ip_set nfnetlink ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6t_NPT ip6t_MASQUERADE nf_nat_masquerade_ipv6 nf_nat nf_conntrack nf_log_ipv6 nf_log_common ip6table_mangle ip6table_filter ip6_tables ip6t_REJECT x_tables nf_reject_ipv6 ip6_udp_tunnel udp_tunnel tun vfat fat ntfs configfs nls_utf8 nls_iso8859_1 nls_cp437 ecb fuse uas uhci_hcd ohci_platform ohci_hcd gpio_button_hotplug
Fri Dec 23 23:24:38 2022 kern.warn kernel: [  505.093990]  exfat
Fri Dec 23 23:24:38 2022 kern.warn kernel: [  505.095893] CPU: 0 PID: 4560 Comm: RTW_CMD_THREAD Tainted: G        W       4.14.241 #0