i would suggest changing the channel width to 20MHz only as some devices dont like the 20/40 HT Above
try putting this in and changing the country code and channel you wish to use
/interface wireless security-profiles
add authentication-types=wpa2-psk eap-methods="" group-ciphers=aes-ccm group-key-update=5m interim-update=0s management-protection=allowed \
management-protection-key="" mode=dynamic-keys name=Security radius-eap-accounting=no radius-mac-accounting=no radius-mac-authentication=no \
radius-mac-caching=disabled radius-mac-format=XX:XX:XX:XX:XX:XX radius-mac-mode=as-username static-algo-0=none static-algo-1=none static-algo-2=none \
static-algo-3=none static-key-0="" static-key-1="" static-key-2="" static-key-3="" static-sta-private-algo=none static-sta-private-key="" \
static-transmit-key=key-0 supplicant-identity="" tls-certificate=none tls-mode=no-certificates unicast-ciphers=aes-ccm wpa-pre-shared-key="" \
wpa2-pre-shared-key=12345678
/interface wireless
set 0 adaptive-noise-immunity=ap-and-client-mode allow-sharedkey=no \
antenna-gain=0 area="" arp=enabled band=2ghz-b/g/n basic-rates-a/g=6Mbps \
basic-rates-b=1Mbps bridge-mode=enabled channel-width=20mhz \
compression=no country="united kingdom" \
default-ap-tx-limit=0 default-authentication=yes default-client-tx-limit=\
0 default-forwarding=yes dfs-mode=no-radar-detect disable-running-check=no disabled=\
no disconnect-timeout=3s distance=indoors frame-lifetime=0 frequency=2437 \
frequency-mode=regulatory-domain frequency-offset=0 hide-ssid=no \
ht-ampdu-priorities="" ht-amsdu-limit=8192 ht-amsdu-threshold=8192 \
ht-basic-mcs=mcs-0,mcs-1,mcs-2,mcs-3,mcs-4,mcs-5,mcs-6,mcs-7 \
ht-guard-interval=any ht-rxchains=0,1 ht-supported-mcs="mcs-0,mcs-1,mcs-2,\
mcs-3,mcs-4,mcs-5,mcs-6,mcs-7,mcs-8,mcs-9,mcs-10,mcs-11,mcs-12,mcs-13,mcs-\
14,mcs-15,mcs-16,mcs-17,mcs-18,mcs-19,mcs-20,mcs-21,mcs-22,mcs-23" \
ht-txchains=0,1 hw-fragmentation-threshold=disabled hw-protection-mode=\
none hw-protection-threshold=0 hw-retries=7 l2mtu=2290 \
max-station-count=2007 mode=ap-bridge mtu=1500 \
multicast-helper=default name=wlan1 noise-floor-threshold=default \
nv2-cell-radius=30 nv2-noise-floor-offset=default nv2-preshared-key="" \
nv2-qos=default nv2-queue-count=2 nv2-security=disabled \
on-fail-retry-time=100ms periodic-calibration=default \
periodic-calibration-interval=60 preamble-mode=both \
proprietary-extensions=post-2.9.25 radio-name=WiFi \
rate-selection=advanced rate-set=default scan-list=default \
security-profile=Security ssid=WiFi station-bridge-clone-mac=\
00:00:00:00:00:00 supported-rates-a/g=\
6Mbps,9Mbps,12Mbps,18Mbps,24Mbps,36Mbps,48Mbps,54Mbps supported-rates-b=\
1Mbps,2Mbps,5.5Mbps,11Mbps tdma-period-size=2 tx-power=17 tx-power-mode=\
card-rates update-stats-interval=disabled wds-cost-range=50-150 \
wds-default-bridge=none wds-default-cost=100 wds-ignore-ssid=no wds-mode=\
disabled wireless-protocol=802.11 wmm-support=disabled
i put this in some of my clients and not have any issues with wireless
oh and set the No-Radar Detect to None oops typo in my config
