Ok,
What software version are you using, can you send your wireless config minus ssid and passwords, from terminal for example:
/interface wireless
set [ find default-name=wlan1 ] band=2ghz-onlyn country="united kingdom" disabled=no frequency=2472 installation=indoor mode=ap-bridge ssid=MikroTik \
wireless-protocol=802.11
set [ find default-name=wlan2 ] band=5ghz-n/ac channel-width=20/40/80mhz-Ceee country="united kingdom" disabled=no frequency=auto installation=indoor mode=ap-bridge ssid=\
MikroTik wireless-protocol=802.11
set [ find default-name=wlan3 ] band=5ghz-a/n/ac channel-width=20/40/80mhz-XXXX country="united kingdom" disabled=no frequency=auto installation=indoor mode=ap-bridge \
skip-dfs-channels=all ssid=MikroTik wireless-protocol=802.11 wps-mode=disabled