Why sometimes Wireguard interface need to manually connect?

Installing and Using OpenWrt Network and Wireless Configuration
1

Hello,I have a problmes during use Wireguard VPN in the openwrt router.
Sometime wireguard VPN interface lost handshake with sever.I need to go to luci ,Network → Interface,and then manually click CONNECT ,after I clicked CONNECT button,VPN tunntel working back as ussaual.
Can you help ?Thank you very much.

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2
3

Yes,My main router have two local ISP WAN . main router have loading blacing policy.So maybe sometimes local ISP's IP will auto change.

4

Yes, and if that is the case, the wireguard watchdog should do help.

5

By the way,How to modify this script below (Because I have multiple wireguard interface,I have to monitor all interface at the same time.

while [[ $tries -lt 3 ]]
do
    if /bin/ping -c 1 192.168.1.1
    then
        logger -t "wg-watchdog" "wireguard working"
        exit 0
    fi
    tries=$((tries+1))
done
systemctl restart wg-quick@wg0
logger -t "wg-watchdog" "wireguard restarted"