CAPsMan connection problem

I have 2 caps, 1 gateway, and wAP. on the caps config I have 2 networks one work, another guest. They are separated to different channels. When > 40 clients are connected, the ping increases to 100-1000 adnd more ms, although the ap hang nearby wireless devices . what’s wrong with my settings and how to establish stability of work?

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mar/27/2018 16:55:41 by RouterOS 6.40.5

software id = H1TC-1RPX

model = 2011UiAS-2HnD

serial number = 614A01503138

/caps-man channel
add band=2ghz-b/g/n frequency=2462 name=CH11_10
add band=2ghz-b/g/n control-channel-width=20mhz frequency=2412 name=CH1_bg
tx-power=18
add band=2ghz-b/g/n frequency=2417 name=CH2
add band=2ghz-b/g/n frequency=2422 name=CH3
add band=2ghz-b/g/n frequency=2427 name=CH4
add band=2ghz-b/g/n frequency=2432 name=CH5
add band=2ghz-b/g/n control-channel-width=20mhz frequency=2437 name=CH6
add band=2ghz-b/g/n frequency=2442 name=CH7
add band=2ghz-b/g/n frequency=2447 name=CH8
add band=2ghz-b/g/n frequency=2452 name=CH9
add band=2ghz-b/g/n frequency=2457 name=CH10
add band=2ghz-b/g/n control-channel-width=20mhz extension-channel=eC
frequency=2462 name=CH11_edit tx-power=18
add band=2ghz-b/g/n frequency=2467 name=CH12
add band=2ghz-b/g/n frequency=2472 name=CH13
/caps-man security
add authentication-types=wpa2-psk encryption=aes-ccm group-encryption=aes-ccm
name=security_localnet passphrase=789123465
add authentication-types=wpa2-psk encryption=aes-ccm group-encryption=aes-ccm
name=security_free passphrase=61529243
/caps-man access-list
add action=accept comment=iphone disabled=no interface=all mac-address=
84:B1:53:77:B4:96 ssid-regexp=“”
add action=accept comment=plansh01 disabled=yes interface=AP-1 mac-address=
A0:2C:36:47:34:CA ssid-regexp=“”
add action=accept comment=plansh01 disabled=no interface=Chehov-1
mac-address=A0:2C:36:47:34:CA ssid-regexp=“”
add action=accept comment=plansh02 disabled=no interface=AP-1 mac-address=
C0:21:0D:20:19:79 ssid-regexp=“”
add action=accept comment=plansh02 disabled=yes interface=Chehov-1
mac-address=C0:21:0D:20:19:79 ssid-regexp=“”
add action=accept comment=mac& disabled=no interface=all mac-address=
A8:66:7F:19:56:8C ssid-regexp=“”
add action=reject disabled=no interface=AP-1 mac-address-mask=
00:00:00:00:00:00 ssid-regexp=“”
add action=reject disabled=no interface=Chehov-1 mac-address-mask=
00:00:00:00:00:00 ssid-regexp=“”
/caps-man configuration
add channel=CH11_10 datapath=datapath1 datapath.client-to-client-forwarding=
yes datapath.local-forwarding=yes mode=ap multicast-helper=full name=
cfg_localnet rx-chains=0,1,2 security=security_localnet ssid=Pro_OP
tx-chains=0,1,2
add channel=CH1_bg datapath=datapath_free datapath.local-forwarding=no mode=
ap multicast-helper=full name=free_cfg rx-chains=0,1,2 security=
security_free ssid=ProFitnes tx-chains=0,1,2
/caps-man datapath
add bridge=bridge-local name=datapath1
add bridge=free_wifi_bridge name=datapath_free
/caps-man interface
add configuration=cfg_localnet disabled=no l2mtu=1600 mac-address=
E4:8D:8C:5C:04:FD master-interface=none name=AP-1 radio-mac=
E4:8D:8C:5C:04:FD
add configuration=free_cfg disabled=no l2mtu=1600 mac-address=
E6:8D:8C:5C:04:FD master-interface=AP-1 name=AP-1-1 radio-mac=
00:00:00:00:00:00
add configuration=cfg_localnet disabled=no l2mtu=1600 mac-address=
00:0C:42:8D:69:9A master-interface=none name=Chehov-1 radio-mac=
00:0C:42:8D:69:9A
add configuration=free_cfg disabled=no l2mtu=1600 mac-address=
02:0C:42:8D:69:9A master-interface=Chehov-1 name=Chehov-1-1 radio-mac=
00:00:00:00:00:00
/caps-man manager
set enabled=yes
/caps-man provisioning
add action=create-enabled master-configuration=cfg_localnet name-format=
identity slave-configurations=free_cfg