diff --git a/v2rayN/ServiceLib/Handler/Builder/CoreConfigContextBuilder.cs b/v2rayN/ServiceLib/Handler/Builder/CoreConfigContextBuilder.cs
index 49fd474f..349aee00 100644
--- a/v2rayN/ServiceLib/Handler/Builder/CoreConfigContextBuilder.cs
+++ b/v2rayN/ServiceLib/Handler/Builder/CoreConfigContextBuilder.cs
@@ -1,5 +1,3 @@
-using System.ComponentModel.DataAnnotations;
-
 namespace ServiceLib.Handler.Builder;
 
 public record CoreConfigContextBuilderResult(CoreConfigContext Context, NodeValidatorResult ValidatorResult)
@@ -205,7 +203,7 @@ public class CoreConfigContextBuilder
                 Context = preSocksResult.Context with
                 {
                     ProtectDomainList =
-                    [.. nodeContext.ProtectDomainList ?? [], .. preSocksResult.Context.ProtectDomainList ?? []],
+                    [.. nodeContext.ProtectDomainList, .. preSocksResult.Context.ProtectDomainList],
                     ProtectCoreTypeList = protectCoreTypeList,
                 },
             };
@@ -386,7 +384,7 @@ public class CoreConfigContextBuilder
         {
             var echQuerySni = node.Sni;
             if (node.StreamSecurity == Global.StreamSecurity
-                && node.EchConfigList?.Contains("://") == true)
+                && node.EchConfigList.Contains("://"))
             {
                 var idx = node.EchConfigList.IndexOf('+');
                 echQuerySni = idx > 0 ? node.EchConfigList[..idx] : node.Sni;
diff --git a/v2rayN/ServiceLib/Handler/Builder/NodeValidator.cs b/v2rayN/ServiceLib/Handler/Builder/NodeValidator.cs
index cf0dacf0..6ac5002a 100644
--- a/v2rayN/ServiceLib/Handler/Builder/NodeValidator.cs
+++ b/v2rayN/ServiceLib/Handler/Builder/NodeValidator.cs
@@ -115,10 +115,10 @@ public class NodeValidator
 
         if (item.GetNetwork() is nameof(ETransport.ws)
             && item.EchConfigList.IsNullOrEmpty()
-            && item.GetAlpn()?.FirstOrDefault() == "h3")
+            && item.GetAlpn()?.FirstOrDefault() is "h3" or "h2")
         {
             v.Warning(
-                "WebSocket but ALPN is set to h3, the core may ignore the ALPN setting or cause unexpected issues.");
+                $"WebSocket but ALPN is set to {item.Alpn}, the core may ignore the ALPN setting or cause unexpected issues.");
         }
 
         // TLS & Security
@@ -131,14 +131,6 @@ public class NodeValidator
                 isCertProvided = false;
             }
 
-            // Check for deprecated allowInsecure property when TLS is enabled
-            if (item.GetAllowInsecure()
-                && item.Cert.IsNullOrEmpty()
-                && item.CertSha.IsNullOrEmpty())
-            {
-                v.Warning(ResUI.MsgAllowInsecureDeprecated);
-            }
-
             if ((coreType == ECoreType.Xray
                 && item.GetAllowInsecure()
                 && !isCertProvided
@@ -147,6 +139,10 @@ public class NodeValidator
                     && item.GetAllowInsecure()
                     && !isCertProvided))
             {
+                if (coreType == ECoreType.Xray)
+                {
+                    v.Warning(ResUI.MsgAllowInsecureDeprecated);
+                }
                 v.Warning(ResUI.MsgInsecureConfiguration);
             }
         }