diff --git a/fmt/Bean2CoreObj_box.cpp b/fmt/Bean2CoreObj_box.cpp
index 241da5f..0bd6dea 100644
--- a/fmt/Bean2CoreObj_box.cpp
+++ b/fmt/Bean2CoreObj_box.cpp
@@ -55,6 +55,7 @@ namespace NekoRay::fmt {
 
         QJsonObject outbound;
         outbound["type"] = socks_http_type == type_HTTP ? "http" : "socks";
+        if (socks_http_type == type_Socks4) outbound["version"] = "4";
         outbound["server"] = serverAddress;
         outbound["server_port"] = serverPort;
 
diff --git a/ui/mainwindow.cpp b/ui/mainwindow.cpp
index 0a72296..d5dda0e 100644
--- a/ui/mainwindow.cpp
+++ b/ui/mainwindow.cpp
@@ -850,12 +850,16 @@ void MainWindow::refresh_proxy_list_impl(const int &id, NekoRay::GroupSortAction
                                   ms_a = NekoRay::profileManager->GetProfile(a)->full_test_report;
                                   ms_b = NekoRay::profileManager->GetProfile(b)->full_test_report;
                               }
+                              auto get_latency_for_sort = [](int id) {
+                                  auto i = NekoRay::profileManager->GetProfile(id)->latency;
+                                  if (i < 0) i = 99999;
+                                  return i;
+                              };
                               if (groupSortAction.descending) {
                                   if (groupSortAction.method == NekoRay::GroupSortMethod::ByLatency) {
-                                      auto int_a = NekoRay::profileManager->GetProfile(a)->latency;
-                                      auto int_b = NekoRay::profileManager->GetProfile(b)->latency;
-                                      if (int_a > 0 && int_b > 0) {
-                                          return int_a > int_b;
+                                      if (ms_a.isEmpty() && ms_b.isEmpty()) {
+                                          // compare latency if full_test_report is empty
+                                          return get_latency_for_sort(a) > get_latency_for_sort(b);
                                       }
                                   }
                                   return ms_a > ms_b;
@@ -863,8 +867,9 @@ void MainWindow::refresh_proxy_list_impl(const int &id, NekoRay::GroupSortAction
                                   if (groupSortAction.method == NekoRay::GroupSortMethod::ByLatency) {
                                       auto int_a = NekoRay::profileManager->GetProfile(a)->latency;
                                       auto int_b = NekoRay::profileManager->GetProfile(b)->latency;
-                                      if (int_a > 0 && int_b > 0) {
-                                          return int_a < int_b;
+                                      if (ms_a.isEmpty() && ms_b.isEmpty()) {
+                                          // compare latency if full_test_report is empty
+                                          return get_latency_for_sort(a) < get_latency_for_sort(b);
                                       }
                                   }
                                   return ms_a < ms_b;
diff --git a/ui/mainwindow_grpc.cpp b/ui/mainwindow_grpc.cpp
index 87d06c5..9cfa248 100644
--- a/ui/mainwindow_grpc.cpp
+++ b/ui/mainwindow_grpc.cpp
@@ -126,9 +126,13 @@ void MainWindow::speedtest_current_group(int mode) {
                     }
                     if (!rpcOK) return;
 
-                    profile->latency = result.ms();
-                    if (profile->latency == 0) profile->latency = -1; // sn
-                    profile->full_test_report = result.full_report().c_str();
+                    if (result.error().empty()) {
+                        profile->latency = result.ms();
+                        if (profile->latency == 0) profile->latency = 1; // nekoray use 0 to represents not tested
+                    } else {
+                        profile->latency = -1;
+                    }
+                    profile->full_test_report = result.full_report().c_str(); // higher priority
                     profile->Save();
 
                     if (!result.error().empty()) {