If the Internet is lost, the iptables rules are reset. Android 5. How to be?

Question

Android

The device on android 5
There are rules that I load on reboot.
Essence. I limit the connection only to a certain openvpn server and after connecting to which I make a wifi hotspot that distributes this connection to the device.
But when the connection is lost, the rules are reset.
The script itself is
iptables -F
iptables -P INPUT DROP
iptables -P FORWARD DROP
iptables -P OUTPUT DROP
iptables -A INPUT -i lo -j ACCEPT
iptables -A OUTPUT -o lo -j ACCEPT
iptables -A INPUT -j ACCEPT -p udp -s xx.xx.xx.xx --sport 1194
iptables -A OUTPUT -j ACCEPT -p udp -d xx.xx.xx.xx --dport 1194
iptables -t filter -F FORWARD
iptables -t nat -F POSTROUTING
iptables -t filter -I FORWARD -j ACCEPT
iptables -t nat -I POSTROUTING -j MASQUERADE
ip rule add from 192.168.43.0/24 lookup 60
ip route add default dev tun0 scope link table 60
ip route add 192.168.43.0/24 dev ap0 scope link table 60
ip route add broadcast 255.255.255.255 dev ap0 scope link table 60