diff --git a/tools/etcpmon/etcpmon_client.c b/tools/etcpmon/etcpmon_client.c
index d3e5e7d6..5060dfd5 100644
--- a/tools/etcpmon/etcpmon_client.c
+++ b/tools/etcpmon/etcpmon_client.c
@@ -927,6 +927,7 @@ int etcpmon_client_process(struct etcpmon_client* client) {
         }
 
         handle_response_with_callback(client, hdr->type, payload, payload_size);
+        if (!client->connected) return -1;
         processed++;
 
         /* Удаляем обработанное сообщение */
@@ -934,7 +935,6 @@ int etcpmon_client_process(struct etcpmon_client* client) {
             memmove(client->recv_buffer, client->recv_buffer + total_size,
                     client->recv_len - total_size);
         }
-        if (!client->connected) return -1;
         client->recv_len -= total_size;
     }
 
diff --git a/tools/etcpmon/etcpmon_doc.md b/tools/etcpmon/etcpmon_doc.md
index 4e22cb89..fac0c8ab 100644
--- a/tools/etcpmon/etcpmon_doc.md
+++ b/tools/etcpmon/etcpmon_doc.md
@@ -4,6 +4,12 @@
 
 Windows GUI монитор для ETCP соединений uTun в реальном времени (100ms refresh). Подключается по TCP к control_server внутри uTun и отображает метрики соединений, линков, TUN-интерфейса, роутера и дебаг-уровней. Позволяет менять debug levels на лету через GUI.
 
+Connections и локальные сокеты опрашиваются раз в секунду, даже при пустом списке соединений.
+Выбор сохраняется по ID узла при изменении порядка и имён. При удалении выбранного соединения
+выбирается первое доступное; пустой список или отключение очищает метрики и график.
+Одновременно ожидается не более одного ответа на автоматический запрос метрик. Таймаут ответа
+на запрос с seq_id — 5 секунд; причина отключения записывается в `etcpmon.log`.
+
 ## 2. Как пользоваться
 
 ### Типовой сценарий
diff --git a/tools/etcpmon/etcpmon_gui.c b/tools/etcpmon/etcpmon_gui.c
index a8f15a88..fbe53e7d 100644
--- a/tools/etcpmon/etcpmon_gui.c
+++ b/tools/etcpmon/etcpmon_gui.c
@@ -22,7 +22,8 @@
 #define WINDOW_WIDTH    1000
 #define WINDOW_HEIGHT   1400
 #define WINDOW_CLIENT_W 1250
-#define UPDATE_INTERVAL 10   /* 50ms → 20 samples per second */
+#define UPDATE_INTERVAL 10
+#define LIST_UPDATE_INTERVAL 1000
 /* Global app pointer for callbacks */
 static struct etcpmon_app* g_app = NULL;
 /* Forward declarations */
@@ -1121,8 +1122,8 @@ static void OnConnect(struct etcpmon_app* app) {
     
     if (etcpmon_client_connect(app->client, addr, port) == 0) {
         app->isConnected = 1;
+        app->need_initial_request = 1;
         UpdateUIState(app);
-        etcpmon_gui_set_status(app, "Connected");
     } else {
         etcpmon_gui_set_status(app, "Connection failed");
     }
@@ -1131,11 +1132,7 @@ static void OnDisconnect(struct etcpmon_app* app) {
     if (!app || !app->client) return;
     
     etcpmon_client_disconnect(app->client);
-    app->isConnected = 0;
-    app->need_initial_request = 1;
-    app->last_selected_peer_id = 0;
-    UpdateUIState(app);
-    etcpmon_gui_set_status(app, "Disconnected");
+    on_disconnected(app);
 }
 
 static void OnConnectionSelect(struct etcpmon_app* app) {
@@ -1144,14 +1141,19 @@ static void OnConnectionSelect(struct etcpmon_app* app) {
     int idx = (int)SendMessage(app->hListConnections, LB_GETCURSEL, 0, 0);
     if (idx == LB_ERR) return;
     
-    uint64_t peer_id = (uint64_t)SendMessage(app->hListConnections, LB_GETITEMDATA, idx, 0);
+    LRESULT list_idx = SendMessage(app->hListConnections, LB_GETITEMDATA, idx, 0);
+    if (list_idx < 0 || list_idx >= app->client->conn_count) return;
+    uint64_t peer_id = app->client->conn_list[list_idx].peer_node_id;
     if (peer_id == 0) return;
     
     /* Только если действительно изменилось — иначе спамим сервер */
     if (peer_id != app->last_selected_peer_id) {
+        if (etcpmon_client_select_connection(app->client, peer_id) != 0) {
+            OnDisconnect(app);
+            etcpmon_gui_set_status(app, "Failed to select connection");
+            return;
+        }
         app->last_selected_peer_id = peer_id;
-        
-        etcpmon_client_select_connection(app->client, peer_id);
         etcpmon_gui_clear_metrics(app);   /* очищаем старые цифры */
         
         etcpmon_gui_set_status(app, "Connection selected");
@@ -1264,9 +1266,7 @@ static void RefreshDebugUI(struct etcpmon_app* app) {
 
 static void OnTimer(struct etcpmon_app* app) {
     if (!app || !app->client) return;
-
-//    fprintf(app->client->log_file, "Timer... \n");
-//    fflush(app->client->log_file);
+    if (!app->client->connected) return;
 
     int processed = etcpmon_client_process(app->client);
     if (processed < 0) {
@@ -1274,10 +1274,17 @@ static void OnTimer(struct etcpmon_app* app) {
         return;
     }
 
-    if (app->need_initial_request && app->isConnected) {
-        etcpmon_client_request_list(app->client);
-        etcpmon_client_request_socket_list(app->client);
-        etcpmon_client_request_debug_config(app->client);
+    if (!app->client->fully_connected) return;
+
+    DWORD now = GetTickCount();
+    if (app->need_initial_request || now - app->last_poll_time >= LIST_UPDATE_INTERVAL) {
+        if (etcpmon_client_request_list(app->client) != 0 || etcpmon_client_request_socket_list(app->client) != 0 ||
+            (app->need_initial_request && etcpmon_client_request_debug_config(app->client) != 0)) {
+            OnDisconnect(app);
+            etcpmon_gui_set_status(app, "Failed to request monitor data");
+            return;
+        }
+        app->last_poll_time = now;
         app->need_initial_request = 0;
     }
 
@@ -1324,6 +1331,12 @@ void etcpmon_gui_update_graph(struct etcpmon_app* app, struct etcpmon_rsp_metric
 static void on_disconnected(void* user_data) {
     struct etcpmon_app* app = (struct etcpmon_app*)user_data;
     app->isConnected = 0;
+    app->need_initial_request = 1;
+    app->last_selected_peer_id = 0;
+    app->last_poll_time = 0;
+    SendMessage(app->hListConnections, LB_RESETCONTENT, 0, 0);
+    SendMessage(app->hListSockets, LB_RESETCONTENT, 0, 0);
+    etcpmon_gui_clear_metrics(app);
     UpdateUIState(app);
     etcpmon_gui_set_status(app, "Disconnected");
 }
@@ -1333,17 +1346,16 @@ static void on_conn_list(struct etcpmon_conn_info* list, uint8_t count, void* us
 
     etcpmon_gui_update_conn_list(app, list, count);
 
-    /* Автоматически выбираем первое соединение (только один раз) */
-    if (count > 0 && app->last_selected_peer_id == 0) {
-        uint64_t first_id = list[0].peer_node_id;
-        app->last_selected_peer_id = first_id;
-
-        etcpmon_client_select_connection(app->client, first_id);
-
-        /* Выделяем первую строку в списке */
-        SendMessage(app->hListConnections, LB_SETCURSEL, 0, 0);
-
-        etcpmon_gui_set_status(app, "Auto-selected first connection");
+    if (count > 0) {
+        OnConnectionSelect(app);
+    } else if (app->last_selected_peer_id != 0) {
+        if (etcpmon_client_select_connection(app->client, 0) != 0) {
+            OnDisconnect(app);
+            return;
+        }
+        app->last_selected_peer_id = 0;
+        etcpmon_gui_clear_metrics(app);
+        etcpmon_gui_set_status(app, "No connections");
     }
 }
 
@@ -1358,7 +1370,6 @@ static void on_metrics(struct etcpmon_rsp_metrics* metrics,
     struct etcpmon_app* app = (struct etcpmon_app*)user_data;
     if (app) {
         etcpmon_gui_update_metrics(app, metrics, links, links_count);
-        etcpmon_client_add_to_history(app->client, metrics);
         if (!app->graph_cursor_active) {
             struct metrics_history* h = etcpmon_client_get_history(app->client);
             if (h && h->count > 0) {
@@ -1522,7 +1533,24 @@ void etcpmon_gui_update_conn_list(struct etcpmon_app* app,
                                    uint8_t count) {
     if (!app || !app->hListConnections) return;
 
-    /* Clear existing items */
+    int selected = count ? 0 : -1;
+    int changed = SendMessage(app->hListConnections, LB_GETCOUNT, 0, 0) != count;
+    for (uint8_t i = 0; i < count; i++) {
+        if (list[i].peer_node_id == app->last_selected_peer_id) selected = i;
+        char display[64], previous[64];
+        snprintf(display, sizeof(display), "%s (%016llX)", list[i].name, (unsigned long long)list[i].peer_node_id);
+        if (!changed && (SendMessage(app->hListConnections, LB_GETTEXTLEN, i, 0) >= (LRESULT)sizeof(previous) ||
+            SendMessageA(app->hListConnections, LB_GETTEXT, i, (LPARAM)previous) == LB_ERR || strcmp(display, previous) != 0)) {
+            changed = 1;
+        }
+    }
+    if (!changed) {
+        SendMessage(app->hListConnections, LB_SETCURSEL, selected, 0);
+        return;
+    }
+
+    int top = (int)SendMessage(app->hListConnections, LB_GETTOPINDEX, 0, 0);
+    SendMessage(app->hListConnections, WM_SETREDRAW, FALSE, 0);
     SendMessage(app->hListConnections, LB_RESETCONTENT, 0, 0);
 
     /* Add new items */
@@ -1532,10 +1560,22 @@ void etcpmon_gui_update_conn_list(struct etcpmon_app* app,
                 list[i].name, (unsigned long long)list[i].peer_node_id);
 
         int idx = (int)SendMessageA(app->hListConnections, LB_ADDSTRING, 0, (LPARAM)display);
-        if (idx != LB_ERR) {
-            SendMessage(app->hListConnections, LB_SETITEMDATA, idx, (LPARAM)list[i].peer_node_id);
+        if (idx != LB_ERR && idx != LB_ERRSPACE) {
+            /* Индекс сохраняет полный 64-битный ID и в 32-битной Windows. */
+            SendMessage(app->hListConnections, LB_SETITEMDATA, idx, i);
+        } else if (app->client && app->client->log_file) {
+            fprintf(app->client->log_file, "[ERROR] Failed to add connection row: index=%u result=%d\n", i, idx);
         }
     }
+    SendMessage(app->hListConnections, LB_SETCURSEL, selected, 0);
+    if (top >= 0 && top < count) SendMessage(app->hListConnections, LB_SETTOPINDEX, top, 0);
+    SendMessage(app->hListConnections, WM_SETREDRAW, TRUE, 0);
+    InvalidateRect(app->hListConnections, NULL, TRUE);
+    if (app->client && app->client->log_file) {
+        fprintf(app->client->log_file, "[LOG] Connections updated: count=%u selected_row=%d previous_peer=%016llX\n",
+                count, selected, (unsigned long long)app->last_selected_peer_id);
+        fflush(app->client->log_file);
+    }
 }
 
 static const char* config_type_to_string(uint8_t config_type) {
@@ -1565,7 +1605,7 @@ static const char* nat_type_to_string(uint8_t nat_type) {
 void etcpmon_gui_update_socket_list(struct etcpmon_app* app,
                                      struct etcpmon_socket_info* list,
                                      uint8_t count) {
-    if (!app || !app->hListSockets || !list || count == 0 || count > 32) return;
+    if (!app || !app->hListSockets) return;
 
     SendMessage(app->hListSockets, LB_RESETCONTENT, 0, 0);
 
@@ -1917,4 +1957,15 @@ void etcpmon_gui_clear_metrics(struct etcpmon_app* app) {
     if (app->hListLinks) {
         SendMessage(app->hListLinks, LB_RESETCONTENT, 0, 0);
     }
+    if (app->client) {
+        memset(&app->client->history, 0, sizeof(app->client->history));
+        free(app->client->last_metrics);
+        app->client->last_metrics = NULL;
+        free(app->client->last_links);
+        app->client->last_links = NULL;
+        app->client->last_links_count = 0;
+    }
+    app->graph_cursor_active = 0;
+    for (int i = 0; i < GRAPH_METRICS_COUNT; i++) SetWindowTextA(app->hChannelValue[i], "");
+    if (app->hGraphWnd) InvalidateRect(app->hGraphWnd, NULL, TRUE);
 }