ksuuk, some pictures for you. cAP AC in wireless bridge mode, installed into ceiling of a room in a private house, no nearby wireless networks. All client devices situated ~5m from the router: iPhone11 (23:87), Lenovo T440p laptop(F7:D6) and old Samsung phone with Android 5.1.1 from 2016(F2:CC): https://imgur.com/a/S9YkqYW
Check the registration rates, I won’t post speedtest results bc I don’t need much speed here, only TeliaTV (removed VLAN4 configuration) and browsing. First picture: both radios enabled, second picuture: only 2.4GHz enabled. Simple everything auto wireless bridge configuration as I suggested you in the beginning. Works like a charm.
/interface bridge
add comment=defconf name=bridge \
protocol-mode=none
/interface wireless security-profiles
set [ find default=yes ] supplicant-identity=MikroTik
add authentication-types=wpa2-psk disable-pmkid=yes eap-methods="" mode=\
dynamic-keys name=turva1 supplicant-identity=MikroTik \
wpa2-pre-shared-key=XXXXXXXXX
/interface wireless
set [ find default-name=wlan1 ] adaptive-noise-immunity=ap-and-client-mode \
band=2ghz-onlyn channel-width=20/40mhz-XX country=estonia disabled=no \
distance=indoors frequency=auto mode=ap-bridge security-profile=turva1 \
ssid=YYYYYY wireless-protocol=802.11 wps-mode=disabled
set [ find default-name=wlan2 ] adaptive-noise-immunity=ap-and-client-mode \
band=5ghz-n/ac channel-width=20/40/80mhz-XXXX country=estonia distance=\
indoors frequency=auto mode=ap-bridge security-profile=turva1 ssid=YYYYY \
wireless-protocol=802.11 wps-mode=disabled
/interface bridge port
add bridge=bridge comment=defconf interface=ether1
add bridge=bridge comment=defconf interface=wlan1
add bridge=bridge comment=defconf interface=wlan2
/ip dhcp-client
add comment=defconf disabled=no interface=bridge
/ip service
set telnet disabled=yes
set ftp disabled=yes
set www port=8888
set api disabled=yes
set api-ssl disabled=yes
/ip ssh
set forwarding-enabled=remote strong-crypto=yes
/system clock
set time-zone-name=Europe/Tallinn
/system identity
set name=xxxxCAP1
/system leds settings
set all-leds-off=immediate
/system ntp client
set enabled=yes server-dns-names="time.google.com,0.pool.ntp.org,1.pool.ntp.or\
g,2.pool.ntp.org,3.pool.ntp.org"
/system routerboard settings set auto-upgrade=yes
/system watchdog
set watchdog-timer=no
/tool bandwidth-server
set authenticate=no enabled=no
/tool graphing interface
add allow-address=192.168.0.0/16
/tool graphing queue
add allow-address=192.168.0.0/16
/tool graphing resource
add allow-address=192.168.0.0/16