Wireguard Block non vpn traffic killswitch not working

Routers VPN, DNS, Leaks
1

I have a GL-AX1800 with Wireguard vpn client and server. On the Client I'm running v4.6.8 and the Killswitch stop working. When the vpn was down it will cut internet on all devices. Now it will disconnect and connect to my ISP.

2

This doesn't seem possible.

Could you share a screen recording of the behavior possibly? And screenshots of your setup and "kill switch" enabled.

Thanks