And here are my logs:
— before Join —
Fri Jan 14 10:15:20 2022 kern.warn kernel: [ 47.557266] load fw image from fw_header_image
Fri Jan 14 10:15:20 2022 kern.warn kernel: [ 47.561775] AndesMTLoadFwMethod1(2548)::pChipCap->fw_len(63536)
Fri Jan 14 10:15:20 2022 kern.warn kernel: [ 47.567789] FW Version:
Fri Jan 14 10:15:20 2022 kern.warn kernel: [ 47.567793] _
Fri Jan 14 10:15:20 2022 kern.warn kernel: [ 47.570270] e
Fri Jan 14 10:15:20 2022 kern.warn kernel: [ 47.571862] 2
Fri Jan 14 10:15:20 2022 kern.warn kernel: [ 47.573468] _
Fri Jan 14 10:15:20 2022 kern.warn kernel: [ 47.575063] m
Fri Jan 14 10:15:20 2022 kern.warn kernel: [ 47.576657] p
Fri Jan 14 10:15:20 2022 daemon.info dnsmasq[1246]: exiting on receipt of SIGTERM
Fri Jan 14 10:15:21 2022 user.notice firewall: Reloading firewall due to ifup of lan (br-lan)
Fri Jan 14 10:15:21 2022 user.info : gl_health start->
Fri Jan 14 10:15:23 2022 daemon.notice procd: /etc/rc.d/S99lighttpd: sed: /etc/lighttpd/conf.d/10-port.conf: No such file or directory
Fri Jan 14 10:15:23 2022 daemon.notice procd: /etc/rc.d/S99lighttpd: netstat: showing only processes with your user ID
Fri Jan 14 10:15:26 2022 daemon.notice procd: /etc/rc.d/S99wireguard: uci: Entry not found
Fri Jan 14 10:15:27 2022 user.notice wireguard: wireguard client start
Fri Jan 14 10:15:27 2022 daemon.notice procd: /etc/rc.d/S99wireguard_server: uci: Entry not found
Fri Jan 14 10:15:27 2022 daemon.info procd: - init complete -
Fri Jan 14 10:15:29 2022 daemon.info dnsmasq[2231]: started, version 2.80 cachesize 150
Fri Jan 14 10:15:29 2022 daemon.notice netifd: wan (1861): udhcpc: sending discover
Fri Jan 14 10:15:29 2022 daemon.info dnsmasq[2231]: DNS service limited to local subnets
Fri Jan 14 10:15:29 2022 daemon.info dnsmasq[2231]: compile time options: IPv6 GNU-getopt no-DBus no-i18n no-IDN DHCP DHCPv6 no-Lua TFTP conntrack ipset auth nettlehash DNSSEC no-ID loop-detect inotify dumpfile
Fri Jan 14 10:15:29 2022 daemon.info dnsmasq-dhcp[2231]: DHCP, IP range 192.168.8.100 – 192.168.8.249, lease time 12h
Fri Jan 14 10:15:29 2022 daemon.info dnsmasq[2231]: using local addresses only for domain test
Fri Jan 14 10:15:29 2022 daemon.info dnsmasq[2231]: using local addresses only for domain onion
Fri Jan 14 10:15:29 2022 daemon.info dnsmasq[2231]: using local addresses only for domain localhost
Fri Jan 14 10:15:29 2022 daemon.info dnsmasq[2231]: using local addresses only for domain local
Fri Jan 14 10:15:29 2022 daemon.info dnsmasq[2231]: using local addresses only for domain invalid
Fri Jan 14 10:15:29 2022 daemon.info dnsmasq[2231]: using local addresses only for domain bind
Fri Jan 14 10:15:29 2022 daemon.info dnsmasq[2231]: using local addresses only for domain lan
Fri Jan 14 10:15:29 2022 daemon.warn dnsmasq[2231]: no servers found in /tmp/resolv.conf.auto, will retry
Fri Jan 14 10:15:29 2022 daemon.info dnsmasq[2231]: read /etc/hosts - 4 addresses
Fri Jan 14 10:15:29 2022 daemon.info dnsmasq[2231]: read /tmp/hosts/dhcp.cfg01411c - 2 addresses
Fri Jan 14 10:15:30 2022 daemon.info dnsmasq-dhcp[2231]: read /etc/ethers - 0 addresses
Fri Jan 14 10:15:41 2022 user.info mwan3rtmon[2174]: Detect rtchange event.
Fri Jan 14 10:15:42 2022 daemon.notice netifd: Network device ‘ra0’ link is up
Fri Jan 14 10:15:43 2022 daemon.notice procd: /etc/init.d/network: Interface doesn’t accept private ioctl…
Fri Jan 14 10:15:43 2022 daemon.notice procd: /etc/init.d/network: set (8BE2): Invalid argument
Fri Jan 14 10:15:43 2022 daemon.notice procd: /etc/init.d/network: mt7628(mt7628): enable failed
Fri Jan 14 10:15:48 2022 daemon.info dnsmasq-dhcp[2231]: DHCPDISCOVER(br-lan) 4c:1d:96:ad:2e:8d
Fri Jan 14 10:15:48 2022 daemon.info dnsmasq-dhcp[2231]: DHCPOFFER(br-lan) 192.168.8.211 4c:1d:96:ad:2e:8d
Fri Jan 14 10:15:48 2022 daemon.info dnsmasq-dhcp[2231]: DHCPREQUEST(br-lan) 192.168.8.211 4c:1d:96:ad:2e:8d
Fri Jan 14 10:15:48 2022 daemon.warn dnsmasq-dhcp[2231]: Ignoring domain pyro.groupe.local for DHCP host name E3541D03
Fri Jan 14 10:15:48 2022 daemon.info dnsmasq-dhcp[2231]: DHCPACK(br-lan) 192.168.8.211 4c:1d:96:ad:2e:8d E3541D03
Fri Jan 14 10:16:58 2022 authpriv.info dropbear[4479]: Child connection from 192.168.8.211:7628
Fri Jan 14 10:17:02 2022 authpriv.notice dropbear[4479]: Password auth succeeded for ‘root’ from 192.168.8.211:7628

— After Join —
Fri Jan 14 10:44:41 2022 authpriv.info dropbear[328]: Child connection from 192.168.8.157:1147
Fri Jan 14 10:44:48 2022 authpriv.notice dropbear[328]: Password auth succeeded for ‘root’ from 192.168.8.157:1147
Fri Jan 14 10:45:07 2022 user.info : gl_health start->
Fri Jan 14 10:46:08 2022 user.info : saved ssid ignore: DLF_Power 0
Fri Jan 14 10:46:08 2022 user.info : [ 810] gl-sdk>> bIsSaved=0, ssid=DLF_Power, encryption=psk, bssid=3A:86:AE:8C:C5:D0, wds=0, device=mt7628, identity=, channel=1
Fri Jan 14 10:46:09 2022 user.info : [ 2749] gl-wifi-core>> bIsStaEnabled=1
Fri Jan 14 10:46:34 2022 user.info : [ 817] gl-sdk>> wifi_join return=-5, channel=1
Fri Jan 14 10:46:34 2022 user.info : [ 1754] gl-wifi-core>> Restart wifi…
Fri Jan 14 10:46:35 2022 daemon.notice netifd: Network device ‘ra0’ link is down
Fri Jan 14 10:46:42 2022 daemon.notice netifd: Network device ‘ra0’ link is up
Fri Jan 14 10:46:43 2022 daemon.notice netifd: Network device ‘ra0’ link is down
Fri Jan 14 10:46:49 2022 daemon.notice netifd: Network device ‘ra0’ link is up

Hope that is enough for you. If you want more, please tell me.
Thanks a lot.
Joël.