diff --git a/kitty/fast_data_types.pyi b/kitty/fast_data_types.pyi
index 59261ab79..f2024f518 100644
--- a/kitty/fast_data_types.pyi
+++ b/kitty/fast_data_types.pyi
@@ -1343,5 +1343,5 @@ def set_os_window_title(os_window_id: int, title: str) -> None:
     pass
 
 
-def update_ime_position_for_window(window_id: int, force: bool = False) -> bool:
+def update_ime_position_for_window(window_id: int, force: bool = False, lost_focus: bool = False) -> bool:
     pass
diff --git a/kitty/keys.c b/kitty/keys.c
index 5985182d9..3df22607d 100644
--- a/kitty/keys.c
+++ b/kitty/keys.c
@@ -79,6 +79,12 @@ active_window(void) {
     return NULL;
 }
 
+void
+update_ime_focus(OSWindow *osw, bool focused) {
+    GLFWIMEUpdateEvent ev = { .focused = focused, .type = GLFW_IME_UPDATE_FOCUS };
+    glfwUpdateIMEState(osw->handle, &ev);
+}
+
 void
 update_ime_position(Window* w, Screen *screen) {
     unsigned int cell_width = global_state.callback_os_window->fonts_data->cell_width, cell_height = global_state.callback_os_window->fonts_data->cell_height;
diff --git a/kitty/screen.c b/kitty/screen.c
index a3211a41a..baa698571 100644
--- a/kitty/screen.c
+++ b/kitty/screen.c
@@ -762,7 +762,7 @@ restore_overlay_line(struct SaveOverlayLine *sol) {
         debug("Received input from child (%s) while overlay active. Overlay contents: %s\n", sol->func_name, PyUnicode_AsUTF8(sol->overlay_text));
         screen_draw_overlay_text(sol->screen, PyUnicode_AsUTF8(sol->overlay_text));
         Py_DECREF(sol->overlay_text);
-        update_ime_position_for_window(sol->screen->window_id, false);
+        update_ime_position_for_window(sol->screen->window_id, false, false);
     }
 }
 
diff --git a/kitty/state.c b/kitty/state.c
index c221d5d2d..e32522967 100644
--- a/kitty/state.c
+++ b/kitty/state.c
@@ -602,7 +602,7 @@ send_pending_click_to_window_id(id_type timer_id UNUSED, void *data) {
 }
 
 bool
-update_ime_position_for_window(id_type window_id, bool force) {
+update_ime_position_for_window(id_type window_id, bool force, bool lost_focus) {
     for (size_t o = 0; o < global_state.num_os_windows; o++) {
         OSWindow *osw = global_state.os_windows + o;
         for (size_t t = 0; t < osw->num_tabs; t++) {
@@ -613,7 +613,8 @@ update_ime_position_for_window(id_type window_id, bool force) {
                     if (window->render_data.screen && (force || osw->is_focused)) {
                         OSWindow *orig = global_state.callback_os_window;
                         global_state.callback_os_window = osw;
-                        update_ime_position(window, window->render_data.screen);
+                        if (lost_focus) update_ime_focus(osw, false);
+                        else update_ime_position(window, window->render_data.screen);
                         global_state.callback_os_window = orig;
                         return true;
                     }
@@ -652,8 +653,9 @@ update_ime_position_for_window(id_type window_id, bool force) {
 PYWRAP1(update_ime_position_for_window) {
     id_type window_id;
     int force = 0;
-    PA("K|p", &window_id, &force);
-    if (update_ime_position_for_window(window_id, force)) Py_RETURN_TRUE;
+    int lost_focus = 0;
+    PA("K|pp", &window_id, &force, &lost_focus);
+    if (update_ime_position_for_window(window_id, force, lost_focus)) Py_RETURN_TRUE;
     Py_RETURN_FALSE;
 }
 
diff --git a/kitty/state.h b/kitty/state.h
index 1631ed502..903601f73 100644
--- a/kitty/state.h
+++ b/kitty/state.h
@@ -335,6 +335,7 @@ void get_platform_dependent_config_values(void *glfw_window);
 bool draw_window_title(OSWindow *window, const char *text, color_type fg, color_type bg, uint8_t *output_buf, size_t width, size_t height);
 uint8_t* draw_single_ascii_char(const char ch, size_t *result_width, size_t *result_height);
 bool is_os_window_fullscreen(OSWindow *);
+void update_ime_focus(OSWindow* osw, bool focused);
 void update_ime_position(Window* w, Screen *screen);
-bool update_ime_position_for_window(id_type window_id, bool force);
+bool update_ime_position_for_window(id_type window_id, bool force, bool lost_focus);
 void set_ignore_os_keyboard_processing(bool enabled);
diff --git a/kitty/window.py b/kitty/window.py
index c11ae0408..c5d470384 100644
--- a/kitty/window.py
+++ b/kitty/window.py
@@ -689,6 +689,9 @@ class Window:
                 tab = self.tabref()
                 if tab is not None:
                     tab.relayout_borders()
+        else:
+            # Cancel IME composition after loses focus
+            update_ime_position_for_window(self.id, True, True)
 
     def title_changed(self, new_title: Optional[str]) -> None:
         self.child_title = sanitize_title(new_title or self.default_title)
@@ -1021,6 +1024,8 @@ class Window:
         self.call_watchers(self.watchers.on_close, {})
         self.destroyed = True
         if hasattr(self, 'screen'):
+            # Cancel IME composition when window is destroyed
+            update_ime_position_for_window(self.id, True, True)
             # Remove cycles so that screen is de-allocated immediately
             self.screen.reset_callbacks()
             del self.screen