NL80211_CMD_NOTIFY_CQM cause wpa_supplicant reconnect ap

Thu Jun 22 19:55:11 2017 daemon.debug wpa_supplicant[28836]: nl80211: Event message available
Thu Jun 22 19:55:11 2017 daemon.debug wpa_supplicant[28836]: nl80211: Drv Event 64 (NL80211_CMD_NOTIFY_CQM) received for wlan0
Thu Jun 22 19:55:11 2017 user.notice root: 1498132511 AP not avaiable,1/5, next check in 1 second
Thu Jun 22 19:55:12 2017 daemon.debug wpa_supplicant[28836]: RTM_NEWLINK: ifi_index=28 ifname=wlan0 master=4 operstate=33554432 ifi_family=7 ifi_flags=0x1003 ([UP])
Thu Jun 22 19:55:12 2017 daemon.debug wpa_supplicant[28836]: nl80211: Add ifindex 4 for bridge br-lan
Thu Jun 22 19:55:12 2017 daemon.debug wpa_supplicant[28836]: nl80211: Add own interface ifindex 4 (ifidx_reason 28)
Thu Jun 22 19:55:12 2017 daemon.debug wpa_supplicant[28836]: nl80211: ifindex 4 already in the list
Thu Jun 22 19:55:12 2017 daemon.debug wpa_supplicant[28836]: RTM_NEWLINK: ifi_index=28 ifname=wlan0 master=4 operstate=33554432 ifi_family=7 ifi_flags=0x1003 ([UP])
Thu Jun 22 19:55:12 2017 daemon.debug wpa_supplicant[28836]: nl80211: Add ifindex 4 for bridge br-lan
Thu Jun 22 19:55:12 2017 daemon.debug wpa_supplicant[28836]: nl80211: Add own interface ifindex 4 (ifidx_reason 28)
Thu Jun 22 19:55:12 2017 daemon.debug wpa_supplicant[28836]: nl80211: ifindex 4 already in the list
Thu Jun 22 19:55:12 2017 daemon.debug wpa_supplicant[28836]: RTM_NEWLINK: ifi_index=28 ifname=wlan0 operstate=33554432 linkmode=16777216 master=4 ifi_family=0 ifi_flags=0x1003 ([UP])
Thu Jun 22 19:55:12 2017 daemon.notice netifd: Network device 'wlan0' link is down
Thu Jun 22 19:55:12 2017 kern.info kernel: [93062.526718] br-lan: port 2(wlan0) entered disabled state

wpa_cli singal_monitor log:

Singal monitor threshold=0 hysteresis=0

I think threshold=0 should have disable CQM(connection quality monitor) event.