Wifi Router internet goes down if a AD user tries to access internet via a WIFI router whose IP address is added to the Firewall rule allowed list

Hi Sophos community,

I'm having a issue for my Wireless router. I have created two rules:

1. Rule 1 for AD users to WAN

In the above rule internet is allowed once user is authenticated via AD. Everything is working fine.

2. Rule 2 for Wifi router to WAN

In the above rule I have assigned an LAN IP address to a router WAN interface and have added that IP address in the Sophos source IP list i.e 192.168.1.10/24 setting destination networks any any. On the router LAN interface IP address is 192.168.2.1 and is running a DHCP  service range 192.168.2.20-192.168.2.200. 

When a non AD user connect to this Wi-Fi router he connects perfectly and internet start working on the that Wi-Fi device. Problem comes when a AD user tries to connect that Wi-Fi router to access internet, he stucks on the authentication and whole internet on the router goes down.

That AD user is also already added in the Rule 1 for AD users to WAN. What can be the possible issue? My goal is if a AD or non AD user connects to that Wi-Fi router it should connect perfectly and internet should work on it and when the AD user connects with local LAN it should be authenticated via Rule 1.