diff --git a/src/gui/render.cpp b/src/gui/render.cpp
index 77075ad..d9cdc72 100644
--- a/src/gui/render.cpp
+++ b/src/gui/render.cpp
@@ -893,7 +893,7 @@ void Render::UpdateInteractions() {
     mouse_controller_is_started_ = false;
   }
 
-  if (start_keyboard_capturer_ && foucs_on_stream_window_) {
+  if (start_keyboard_capturer_ && focus_on_stream_window_) {
     if (!keyboard_capturer_is_started_) {
       StartKeyboardCapturer();
       keyboard_capturer_is_started_ = true;
@@ -2176,7 +2176,7 @@ void Render::ProcessSdlEvent(const SDL_Event& event) {
     case SDL_EVENT_WINDOW_FOCUS_GAINED:
       if (stream_window_ &&
           SDL_GetWindowID(stream_window_) == event.window.windowID) {
-        foucs_on_stream_window_ = true;
+        focus_on_stream_window_ = true;
       } else if (main_window_ &&
                  SDL_GetWindowID(main_window_) == event.window.windowID) {
         foucs_on_main_window_ = true;
@@ -2186,7 +2186,7 @@ void Render::ProcessSdlEvent(const SDL_Event& event) {
     case SDL_EVENT_WINDOW_FOCUS_LOST:
       if (stream_window_ &&
           SDL_GetWindowID(stream_window_) == event.window.windowID) {
-        foucs_on_stream_window_ = false;
+        focus_on_stream_window_ = false;
       } else if (main_window_ &&
                  SDL_GetWindowID(main_window_) == event.window.windowID) {
         foucs_on_main_window_ = false;
@@ -2200,7 +2200,7 @@ void Render::ProcessSdlEvent(const SDL_Event& event) {
     case SDL_EVENT_MOUSE_BUTTON_DOWN:
     case SDL_EVENT_MOUSE_BUTTON_UP:
     case SDL_EVENT_MOUSE_WHEEL:
-      if (foucs_on_stream_window_) {
+      if (focus_on_stream_window_) {
         ProcessMouseEvent(event);
       }
       break;
diff --git a/src/gui/render.h b/src/gui/render.h
index 2736d12..2f59a5e 100644
--- a/src/gui/render.h
+++ b/src/gui/render.h
@@ -434,7 +434,7 @@ class Render {
   bool show_cursor_ = false;
   bool keyboard_capturer_is_started_ = false;
   bool foucs_on_main_window_ = false;
-  bool foucs_on_stream_window_ = false;
+  bool focus_on_stream_window_ = false;
   bool main_window_minimized_ = false;
   uint32_t last_main_minimize_request_tick_ = 0;
   uint32_t last_stream_minimize_request_tick_ = 0;
diff --git a/src/gui/windows/stream_window.cpp b/src/gui/windows/stream_window.cpp
index b6f3a4a..ffa58cb 100644
--- a/src/gui/windows/stream_window.cpp
+++ b/src/gui/windows/stream_window.cpp
@@ -138,7 +138,7 @@ int Render::StreamWindow() {
           UpdateRenderRect();
 
           ControlWindow(props);
-          
+
           // Show file transfer window if needed
           FileTransferWindow(props);
 
@@ -151,12 +151,12 @@ int Render::StreamWindow() {
               // std::unique_lock unique_lock(client_properties_mutex_);
               auto erase_it = client_properties_.find(remote_id_to_erase);
               if (erase_it != client_properties_.end()) {
-                erase_it = client_properties_.erase(erase_it);
-                if (client_properties_.empty()) {
-                  SDL_Event event;
-                  event.type = SDL_EVENT_QUIT;
-                  SDL_PushEvent(&event);
-                }
+                // Ensure we flush pending STREAM_REFRESH_EVENT events and
+                // clean up peer resources before erasing the entry, otherwise
+                // SDL events may still hold raw pointers to freed
+                // SubStreamWindowProperties (including video_frame_mutex_),
+                // leading to std::system_error when locking.
+                CloseTab(erase_it);
               }
             }
             // lock.lock();
@@ -236,10 +236,10 @@ int Render::StreamWindow() {
         UpdateRenderRect();
 
         ControlWindow(props);
-        
+
         // Show file transfer window if needed
         FileTransferWindow(props);
-        
+
         ImGui::End();
 
         if (!props->peer_) {
@@ -251,12 +251,7 @@ int Render::StreamWindow() {
             // std::unique_lock unique_lock(client_properties_mutex_);
             auto erase_it = client_properties_.find(remote_id_to_erase);
             if (erase_it != client_properties_.end()) {
-              client_properties_.erase(erase_it);
-              if (client_properties_.empty()) {
-                SDL_Event event;
-                event.type = SDL_EVENT_QUIT;
-                SDL_PushEvent(&event);
-              }
+              CloseTab(erase_it);
             }
           }
           // lock.lock();