Hostapd , PI 3 not working , wifi disappeared after 1 to 3 days

Question

I am having issue with my WIFI hotspot setup the in Raspberry PI 3, using hostapd and static Id, and isc-dhcp-server.

After 1 to 3 days, other device can not see the wifi network , and checked the PI3 hostapd is running, static IP , and wlan0 is up, the hostapd can not be restart with service or systemctrl.

Not sure where I should start looking. Help needed and appreciated.

hostapd.conf

 
interface=wlan0 
driver=nl80211 
ssid=SSID1234 
hw_mode=g 
channel=5 
wmm_enabled=0 
macaddr_acl=0 
auth_algs=1 
ignore_broadcast_ssid=0 
wpa=2 
wpa_passphrase=PASSPHRASE123123123 
wpa_key_mgmt=WPA-PSK 
wpa_pairwise=TKIP 
#rsn_pairwise=CCMP 

DHCPCD.conf

require dhcp_server_identifier
slaac private 
interface wlan0 
  static ip_address=192.168.125.1/24 
  nohook wpa_supplicant 
interface eth1 
  static ip_address=192.168.126.1/24 

I am not using dnsmasq, but with my own DNS server. the issue should not link to DNS server or DHCP server , the WIFI network is not showing up, and the hostapd can not be restart until reboot the box.

uname

4.19.46-v7+ #1231 SMP Mon Jun 3 17:42:48 BST 2019 armv7l GNU/Linux

DHCPD.conf

default-lease-time 60;
max-lease-time 120;

ddns-update-style none;

subnet 192.168.125.0 netmask 255.255.255.0 {
    range 192.168.125.100 192.168.125.230;
        option routers 192.168.125.1;
        option domain-name-servers 192.168.125.1;
        option domain-name "domain.local";

}

subnet 192.168.126.0 netmask 255.255.255.0 {
    range 192.168.126.100 192.168.126.230;
        option routers 192.168.126.1;
        option domain-name-servers 192.168.126.1;
        option domain-name "domain.local";
}