diff --git a/src/routing_layer/topo_group.c b/src/routing_layer/topo_group.c
index 313a9a892..7c00c1069 100644
--- a/src/routing_layer/topo_group.c
+++ b/src/routing_layer/topo_group.c
@@ -441,7 +441,7 @@ int topo_group_data_allowed(struct TOPO_GROUP* group, struct ETCP_CONN* conn) {
 }
 
 void topo_group_revalidate_members(struct TOPO_GROUP* group) {
-    if (!group || group->group_type != TOPO_GROUP_TYPE_CHAT || group->stopping) return;
+    if (!group || group->group_type != TOPO_GROUP_TYPE_CHAT) return;
     etcp_router_revalidate_group(group->instance, group->group_id);
     conn_mgr_revalidate_members(group->conn_mgr);
     radio_revalidate_members(group);
@@ -450,6 +450,7 @@ void topo_group_revalidate_members(struct TOPO_GROUP* group) {
     group_avatar_revalidate_members(group->instance, group->group_id);
     chat_join_revalidate_members(group->instance, group->group_id);
     chat_sync_revalidate_join(group->instance, group->group_id);
+    if (group->stopping) return;
     /* Удаление вызывает callbacks и меняет список; каждый раз ищем следующего заново. */
     for (;;) {
         struct TOPO_GROUP_CONN_ITEM* invalid = NULL;
@@ -680,6 +681,8 @@ fail:
 static void topo_group_destroy(struct TOPO_GROUP* group) {
     if (!group) return;
     group->stopping = 1;
+    /* Отменить и локальные ожидания без router-сессии до освобождения ресурсов группы. */
+    topo_group_revalidate_members(group);
     multicast_close_group(group->instance, group->group_id);
     nat_detection_cancel_group(group->instance->nat_det, group->group_id);
     stream_cancel_group(group->instance, group->group_id);
diff --git a/tests/test_chat_group_isolation.c b/tests/test_chat_group_isolation.c
index 2bae77690..21c08da84 100644
--- a/tests/test_chat_group_isolation.c
+++ b/tests/test_chat_group_isolation.c
@@ -492,6 +492,22 @@ static int join_isolation(void) {
     return 0;
 }
 
+static int stop_isolation(void) {
+    struct UTUN_INSTANCE* server = fixture.nodes[0];
+    REQUIRE(!chat_join_init(server) && !chat_join_store_local_key(server, 112, 9000));
+    int status = 99;
+    REQUIRE(chat_join_register_key(server, 112, 0, 9001, join_registered, &status));
+    REQUIRE(status == 99);
+    topo_groups_remove_group(server->topo_groups, 112);
+    fixture.groups[0][1] = NULL;
+    check("group removal cancels local JOIN before its timer", status == CHAT_JOIN_CANCELLED &&
+          !server->join_keys && !server->join_registrations && !topo_groups_find(server->topo_groups, 112));
+    unsigned before = fixture.broadcast[0];
+    REQUIRE(!send_broadcast(0, 9002));
+    check("removing B preserves A and shared transport", fixture.broadcast[0] == before + 1 && fixture.transport->links_up);
+    return 0;
+}
+
 int main(void) {
     debug_config_init(); debug_set_level(DEBUG_LEVEL_WARN);
     debug_set_category_level(DEBUG_CATEGORY_DEBUG, DEBUG_LEVEL_INFO);
@@ -517,6 +533,7 @@ int main(void) {
 #ifdef __linux__
             if (!fixture.failed && file_isolation(1)) fixture.failed++;
 #endif
+            if (!fixture.failed && stop_isolation()) fixture.failed++;
         }
     }
     pthread_mutex_lock(&fixture.disk_mutex); fixture.disk_released = 1; pthread_cond_signal(&fixture.disk_condition);