Fix

v2rayN/ServiceLib/Handler/ConfigHandler.cs

@@ -1087,6 +1087,8 @@ public static class ConfigHandler
             profileItem.IndexId = Utils.GetGuid(false);
             maxSort = ProfileExManager.Instance.GetMaxSort();
         }
+        var groupType = profileItem.ConfigType == EConfigType.ProxyChain ? EConfigType.ProxyChain.ToString() : profileGroupItem.MultipleLoad.ToString();
+        profileItem.Address = $"{profileItem.CoreType}-{groupType}";
         if (maxSort > 0)
         {
             ProfileExManager.Instance.SetSort(profileItem.IndexId, maxSort + 1);
@@ -1194,10 +1196,10 @@ public static class ConfigHandler
         var indexId = Utils.GetGuid(false);
         var childProfileIndexId = Utils.List2String(selecteds.Select(p => p.IndexId).ToList());
 
-        var remark = string.Empty;
+        var remark = subId.IsNullOrEmpty() ? string.Empty : $"{(await AppManager.Instance.GetSubItem(subId)).Remarks} ";
         if (coreType == ECoreType.Xray)
         {
-            remark = multipleLoad switch
+            remark += multipleLoad switch
             {
                 EMultipleLoad.LeastPing => ResUI.menuGenGroupMultipleServerXrayLeastPing,
                 EMultipleLoad.Fallback => ResUI.menuGenGroupMultipleServerXrayFallback,
@@ -1209,7 +1211,7 @@ public static class ConfigHandler
         }
         else if (coreType == ECoreType.sing_box)
         {
-            remark = multipleLoad switch
+            remark += multipleLoad switch
             {
                 EMultipleLoad.LeastPing => ResUI.menuGenGroupMultipleServerSingBoxLeastPing,
                 EMultipleLoad.Fallback => ResUI.menuGenGroupMultipleServerSingBoxFallback,
@@ -1222,7 +1224,6 @@ public static class ConfigHandler
             CoreType = coreType,
             ConfigType = EConfigType.PolicyGroup,
             Remarks = remark,
-            Address = childProfileIndexId,
         };
         if (!subId.IsNullOrEmpty())
         {

v2rayN/ServiceLib/Services/CoreConfig/Singbox/CoreConfigSingboxService.cs

@@ -363,8 +363,6 @@ public partial class CoreConfigSingboxService(Config config)
 
             await GenLog(singboxConfig);
             await GenInbounds(singboxConfig);
-            await GenRouting(singboxConfig);
-            await GenExperimental(singboxConfig);
 
             var groupRet = await GenGroupOutbound(parentNode, singboxConfig);
             if (groupRet != 0)
@@ -373,6 +371,8 @@ public partial class CoreConfigSingboxService(Config config)
                 return ret;
             }
 
+            await GenRouting(singboxConfig);
+            await GenExperimental(singboxConfig);
             await GenDns(null, singboxConfig);
             await ConvertGeo2Ruleset(singboxConfig);
 
@@ -416,12 +416,10 @@ public partial class CoreConfigSingboxService(Config config)
                 ret.Msg = ResUI.FailedGenDefaultConfiguration;
                 return ret;
             }
+            singboxConfig.outbounds.RemoveAt(0);
 
             await GenLog(singboxConfig);
             await GenInbounds(singboxConfig);
-            await GenRouting(singboxConfig);
-            await GenExperimental(singboxConfig);
-            singboxConfig.outbounds.RemoveAt(0);
 
             var groupRet = await GenGroupOutbound(parentNode, singboxConfig);
             if (groupRet != 0)
@@ -430,6 +428,8 @@ public partial class CoreConfigSingboxService(Config config)
                 return ret;
             }
 
+            await GenRouting(singboxConfig);
+            await GenExperimental(singboxConfig);
             await GenDns(null, singboxConfig);
             await ConvertGeo2Ruleset(singboxConfig);
 

v2rayN/ServiceLib/Services/CoreConfig/Singbox/SingboxOutboundService.cs

@@ -694,6 +694,39 @@ public partial class CoreConfigSingboxService
         for (var i = 0; i < nodes.Count; i++)
         {
             var node = nodes[i];
+            if (node == null)
+                continue;
+            if (node.ConfigType is EConfigType.PolicyGroup or EConfigType.ProxyChain)
+            {
+                ProfileGroupItemManager.Instance.TryGet(node.IndexId, out var profileGroupItem);
+                if (profileGroupItem == null || profileGroupItem.ChildItems.IsNullOrEmpty())
+                {
+                    continue;
+                }
+                var childProfiles = (await Task.WhenAll(
+                        Utils.String2List(profileGroupItem.ChildItems)
+                        .Where(p => !p.IsNullOrEmpty())
+                        .Select(AppManager.Instance.GetProfileItem)
+                    )).Where(p => p != null).ToList();
+                if (childProfiles.Count <= 0)
+                {
+                    continue;
+                }
+                var childBaseTagName = $"{baseTagName}-{i + 1}";
+                var ret = node.ConfigType switch
+                {
+                    EConfigType.PolicyGroup =>
+                        await GenOutboundsList(childProfiles, singboxConfig, profileGroupItem.MultipleLoad, childBaseTagName),
+                    EConfigType.ProxyChain =>
+                        await GenChainOutboundsList(childProfiles, singboxConfig, childBaseTagName),
+                    _ => throw new NotImplementedException()
+                };
+                if (ret == 0)
+                {
+                    proxyTags.Add(childBaseTagName);
+                }
+                continue;
+            }
             var server = await GenServer(node);
             if (server is null)
             {

v2rayN/ServiceLib/Services/CoreConfig/V2ray/CoreConfigV2rayService.cs

@@ -114,9 +114,6 @@ public partial class CoreConfigV2rayService(Config config)
 
             await GenLog(v2rayConfig);
             await GenInbounds(v2rayConfig);
-            await GenRouting(v2rayConfig);
-            await GenDns(null, v2rayConfig);
-            await GenStatistic(v2rayConfig);
 
             var groupRet = await GenGroupOutbound(parentNode, v2rayConfig);
             if (groupRet != 0)
@@ -125,11 +122,15 @@ public partial class CoreConfigV2rayService(Config config)
                 return ret;
             }
 
+            await GenRouting(v2rayConfig);
+            await GenDns(null, v2rayConfig);
+            await GenStatistic(v2rayConfig);
+
             var defaultBalancerTag = $"{Global.ProxyTag}{Global.BalancerTagSuffix}";
 
             //add rule
             var rules = v2rayConfig.routing.rules;
-            if (rules?.Count > 0)
+            if (rules?.Count > 0 && ((v2rayConfig.routing.balancers?.Count ?? 0) > 0))
             {
                 var balancerTagSet = v2rayConfig.routing.balancers
                     .Select(b => b.tag)
@@ -215,13 +216,10 @@ public partial class CoreConfigV2rayService(Config config)
                 ret.Msg = ResUI.FailedGenDefaultConfiguration;
                 return ret;
             }
+            v2rayConfig.outbounds.RemoveAt(0);
 
             await GenLog(v2rayConfig);
             await GenInbounds(v2rayConfig);
-            await GenRouting(v2rayConfig);
-            await GenDns(null, v2rayConfig);
-            await GenStatistic(v2rayConfig);
-            v2rayConfig.outbounds.RemoveAt(0);
 
             var groupRet = await GenGroupOutbound(parentNode, v2rayConfig);
             if (groupRet != 0)
@@ -230,6 +228,10 @@ public partial class CoreConfigV2rayService(Config config)
                 return ret;
             }
 
+            await GenRouting(v2rayConfig);
+            await GenDns(null, v2rayConfig);
+            await GenStatistic(v2rayConfig);
+
             ret.Success = true;
 
             ret.Data = await ApplyFullConfigTemplate(v2rayConfig, true);

v2rayN/ServiceLib/Services/CoreConfig/V2ray/V2rayBalancerService.cs

@@ -4,20 +4,43 @@ public partial class CoreConfigV2rayService
 {
     private async Task<int> GenObservatory(V2rayConfig v2rayConfig, EMultipleLoad multipleLoad, string baseTagName = Global.ProxyTag)
     {
-        if (multipleLoad == EMultipleLoad.LeastPing)
+        // Collect all existing subject selectors from both observatories
+        var subjectSelectors = new List<string>();
+        subjectSelectors.AddRange(v2rayConfig.burstObservatory?.subjectSelector ?? []);
+        subjectSelectors.AddRange(v2rayConfig.observatory?.subjectSelector ?? []);
+
+        // Case 1: exact match already exists -> nothing to do
+        if (subjectSelectors.Any(baseTagName.StartsWith))
+            return await Task.FromResult(0);
+
+        // Case 2: prefix match exists -> reuse it and move to the first position
+        var matched = subjectSelectors.FirstOrDefault(s => s.StartsWith(baseTagName));
+        if (matched is not null)
         {
-            var observatory = new Observatory4Ray
+            baseTagName = matched;
+
+            if (v2rayConfig.burstObservatory?.subjectSelector?.Contains(baseTagName) == true)
             {
-                subjectSelector = [baseTagName],
+                v2rayConfig.burstObservatory.subjectSelector.Remove(baseTagName);
-                probeUrl = AppManager.Instance.Config.SpeedTestItem.SpeedPingTestUrl,
+                v2rayConfig.burstObservatory.subjectSelector.Insert(0, baseTagName);
-                probeInterval = "3m",
-                enableConcurrency = true,
-            };
-            v2rayConfig.observatory = observatory;
             }
-        else if (multipleLoad is EMultipleLoad.LeastLoad or EMultipleLoad.Fallback)
+
+            if (v2rayConfig.observatory?.subjectSelector?.Contains(baseTagName) == true)
             {
-            var burstObservatory = new BurstObservatory4Ray
+                v2rayConfig.observatory.subjectSelector.Remove(baseTagName);
+                v2rayConfig.observatory.subjectSelector.Insert(0, baseTagName);
+            }
+
+            return await Task.FromResult(0);
+        }
+
+        // Case 3: need to create or insert based on multipleLoad type
+        if (multipleLoad is EMultipleLoad.LeastLoad or EMultipleLoad.Fallback)
+        {
+            if (v2rayConfig.burstObservatory is null)
+            {
+                // Create new burst observatory with default ping config
+                v2rayConfig.burstObservatory = new BurstObservatory4Ray
                 {
                     subjectSelector = [baseTagName],
                     pingConfig = new()
@@ -28,8 +51,33 @@ public partial class CoreConfigV2rayService
                         sampling = 2,
                     }
                 };
-            v2rayConfig.burstObservatory = burstObservatory;
             }
+            else
+            {
+                v2rayConfig.burstObservatory.subjectSelector ??= new();
+                v2rayConfig.burstObservatory.subjectSelector.Add(baseTagName);
+            }
+        }
+        else if (multipleLoad is EMultipleLoad.LeastPing)
+        {
+            if (v2rayConfig.observatory is null)
+            {
+                // Create new observatory with default probe config
+                v2rayConfig.observatory = new Observatory4Ray
+                {
+                    subjectSelector = [baseTagName],
+                    probeUrl = AppManager.Instance.Config.SpeedTestItem.SpeedPingTestUrl,
+                    probeInterval = "3m",
+                    enableConcurrency = true,
+                };
+            }
+            else
+            {
+                v2rayConfig.observatory.subjectSelector ??= new();
+                v2rayConfig.observatory.subjectSelector.Add(baseTagName);
+            }
+        }
+
         return await Task.FromResult(0);
     }
 

v2rayN/ServiceLib/Services/CoreConfig/V2ray/V2rayOutboundService.cs

@@ -539,9 +539,11 @@ public partial class CoreConfigV2rayService
             }
 
             //add balancers
+            if (node.ConfigType == EConfigType.PolicyGroup)
+            {
                 await GenObservatory(v2rayConfig, profileGroupItem.MultipleLoad, baseTagName);
                 await GenBalancer(v2rayConfig, profileGroupItem.MultipleLoad, baseTagName);
-
+            }
         }
         catch (Exception ex)
         {
@@ -797,6 +799,35 @@ public partial class CoreConfigV2rayService
         for (var i = 0; i < nodes.Count; i++)
         {
             var node = nodes[i];
+            if (node == null)
+                continue;
+            if (node.ConfigType is EConfigType.PolicyGroup or EConfigType.ProxyChain)
+            {
+                ProfileGroupItemManager.Instance.TryGet(node.IndexId, out var profileGroupItem);
+                if (profileGroupItem == null || profileGroupItem.ChildItems.IsNullOrEmpty())
+                {
+                    continue;
+                }
+                var childProfiles = (await Task.WhenAll(
+                        Utils.String2List(profileGroupItem.ChildItems)
+                        .Where(p => !p.IsNullOrEmpty())
+                        .Select(AppManager.Instance.GetProfileItem)
+                    )).Where(p => p != null).ToList();
+                if (childProfiles.Count <= 0)
+                {
+                    continue;
+                }
+                var childBaseTagName = $"{baseTagName}-{i + 1}";
+                var ret = node.ConfigType switch
+                {
+                    EConfigType.PolicyGroup =>
+                        await GenOutboundsListWithChain(childProfiles, v2rayConfig, childBaseTagName),
+                    EConfigType.ProxyChain =>
+                        await GenChainOutboundsList(childProfiles, v2rayConfig, childBaseTagName),
+                    _ => throw new NotImplementedException()
+                };
+                continue;
+            }
             var txtOutbound = EmbedUtils.GetEmbedText(Global.V2raySampleOutbound);
             if (txtOutbound.IsNullOrEmpty())
             {

v2rayN/ServiceLib/ViewModels/AddGroupServerViewModel.cs

@@ -195,12 +195,12 @@ public class AddGroupServerViewModel : MyReactiveObject
         var childIndexIds = new List<string>();
         foreach (var item in ChildItemsObs)
         {
-            if (!item.IndexId.IsNullOrEmpty())
+            if (item.IndexId.IsNullOrEmpty())
             {
+                continue;
+            }
             childIndexIds.Add(item.IndexId);
         }
-        }
-        SelectedSource.Address = Utils.List2String(childIndexIds);
         var profileGroup = ProfileGroupItemManager.Instance.GetOrCreateAndMarkDirty(SelectedSource.IndexId);
         profileGroup.ChildItems = Utils.List2String(childIndexIds);
         profileGroup.MultipleLoad = PolicyGroupType switch