Issues with OpenClash on Router + AdGuard Home on Synology NAS (using Docker) as NameServer for DNS Cache Acceleration（Problem: Websites that were previously visited become inaccessible, while new websites can be accessed.））

[Kollata]

Summary of My Network Topology and Configuration:

Layer 1: Optical Modem (LAN address: 192.168.1.1)

-Mode: Bridge Mode
-DHCP: Disabled

Layer 2: Primary Router (LAN address: 192.168.0.1)

-WAN Port: Connected to Optical Modem
-DHCP: Enabled
-OpenClash: Configured with node subscription, using Fake-IP (TUN-Mixed) mode
-DNS Settings:
-NameServer: Pointing to AdGuard Home on NAS
-Fallback: 8.8.8.8

Layer 3: 10G Switch
-LAN1 Port: Connected to Primary Router
-LAN2 Port: Connected to NAS
-LAN3 Port: Connected to Computer

Layer 4: NAS (IP: 192.168.0.106)
-AdGuard Home: Installed via Docker - serves as DNS server for OpenClash on Primary Router

@issue Manifestation: Once the NameServer in OpenClash is changed to AdGuard Home DNS configuration (address 192.168.0.106; port 1053; UDP) and applied, the entire local network cannot access previously visited websites (even after clearing router and computer DNS cache). New websites can be accessed.

1. On mobile devices, the WiFi icon shows an exclamation mark indicating network issues, but new websites can still be accessed.

2. On computers, the network icon appears normal, new websites can be accessed, but previously visited sites like Baidu and Google become inaccessible.

【Suspicions】

1.Conflict with Split Routing Rules: I've noticed the last rules in my split routing configuration are:
ruleset=🚀 Node Selection,[]DOMAIN-SUFFIX,xn--ngstr-lra8j.com
ruleset=🚀 Node Selection,[]DOMAIN-SUFFIX,services.googleapis.cn
ruleset=🚀 Node Selection,https://raw.githubusercontent.com/ACL4SSR/ACL4SSR/master/Clash/Ruleset/GoogleCNProxyIP.list
ruleset=🎯 Direct Connect Worldwide,[]GEOIP,CN,no-resolve
ruleset=🐟 Catch-All,[]FINAL

2.Router Firewall or Fake-IP Conflict: Could it be related to firewall settings on the router or a conflict with Fake-IP?