Mitm Attack-Arp Spoofing

When I do ARP spoofing attack against my Windows host from my Kali that is installed virtually on it, I get sucess and I can sniff packets, credentials and so on. However, when I do this attack on any other device on my network that device's Internet connection gets disconnected and from that device I can't browse anything.

I did IP forwarding using this command:

echo 1 > /proc/sys/net/ipv4/ip_forward

I changed iptables in etter.conf and many other things that I found out online but I can't get it done. Even the ARP table of the device changes as I want but the Internet connection of that device (victim's device; my Kali's Internet works properly) terminates.

What should I do?