CAP stops running after seconds

Hi,

I’ve configured two caps on a RB750GL as CAPsMAN.

One CAP (wap) stops running after some seconds and turns from DRSMB status to DSMB

My CAPsMAN configuration

/caps-man channel
add band=2ghz-g/n control-channel-width=20mhz extension-channel=Ce frequency=2417 name=channel1
/caps-man datapath
add bridge=Rete_casa client-to-client-forwarding=yes name=Rete_casa
/caps-man security
add authentication-types=wpa-psk,wpa2-psk encryption=aes-ccm group-encryption=aes-ccm name=security1
/caps-man configuration
add channel=channel1 country=italy datapath.bridge=Rete_casa datapath.client-to-client-forwarding=yes name=cfg1 security=security1 ssid=Rete_casa
/caps-man access-list
add action=accept allow-signal-out-of-range=10s disabled=yes interface=any signal-range=-85..120 ssid-regexp=""
add action=reject allow-signal-out-of-range=10s disabled=yes interface=any signal-range=-120..-86 ssid-regexp=""
/caps-man manager
set enabled=yes
/caps-man manager interface
set [ find default=yes ] forbid=yes
add disabled=no interface=Rete_casa
/caps-man provisioning
add action=create-dynamic-enabled master-configuration=cfg1 name-format=identity

My CAP configuration:

/interface bridge
add name=bridge1
/interface wireless
# managed by CAPsMAN
# channel: 2417/20-Ce/gn(20dBm), SSID: Rete_casa, CAPsMAN forwarding
set [ find default-name=wlan1 ] ssid=MikroTik
/interface list
add name=WAN
add name=LAN
/interface wireless security-profiles
set [ find default=yes ] supplicant-identity=MikroTik
/ip hotspot profile
set [ find default=yes ] html-directory=flash/hotspot
/interface bridge port
add bridge=bridge1 interface=ether1
/interface list member
add interface=ether1 list=WAN
/interface wireless cap
# 
set bridge=bridge1 discovery-interfaces=ether1 enabled=yes interfaces=wlan1
/ip dhcp-client
add dhcp-options=hostname,clientid disabled=no interface=bridge1
/system clock
set time-zone-name=Europe/Rome
/system identity
set name="AP Portico"
/system routerboard settings
set silent-boot=no

Many thanks