make sure the display is updated when resuming the app

main.py

@@ -99,6 +99,11 @@ def build(self):
         Window.clearcolor = (0, 0, 0, 1)
         self.icon = PATH_IMAGES + "logo.png"
 
+    def on_resume(self):
+        current_screen_name = self.root_window.children[0].current
+        self.root_window.children[0].get_screen(current_screen_name).refresh()
+        return super().on_resume()
+
     def on_start(self):
         if MOBILE_MODE:
             Window.update_viewport()

screens/menu.kv

@@ -26,15 +26,15 @@
     Label:
         id: start_label
         text: root.start_label_text
-        size_hint: 1, 0.25
+        size_hint: 0.7, 0.25
         pos_hint: {"center_x": 0.5, "center_y": 0.45}
         font_size: 50*root.font_ratio
         font_name: root.font_name
         color: TITLE_FONT_COLOR
         outline_width: 2
         outline_color: (1,1,1,1)
     Button:
-        size_hint: 1, 0.25
+        size_hint: 0.7, 0.25
         pos_hint: {"center_x": 0.5, "center_y": 0.45}
         background_color: 0, 0, 0, 0
         on_release:

tools/kivy_tools/screen.py

@@ -13,7 +13,9 @@
 ### Kivy imports ###
 
 from kivy.core.window import Window
+from kivy.clock import Clock
 from kivy.uix.screenmanager import Screen
+from kivy.uix.label import Label
 from kivy.properties import (
     StringProperty,
     NumericProperty,
@@ -206,3 +208,11 @@ def enable_widget(self, widget_id: str):
         widget.opacity = 1
         widget.disabled = False
         widget.pos_hint = self.temp_pos[widget_id]
+
+    def refresh(self):
+        self.label_widget = Label(text=" ", pos_hint={"x": 1, "y": 1})
+        self.add_widget(self.label_widget)
+        Clock.schedule_once(self.post_refresh)
+
+    def post_refresh(self, *args):
+        self.remove_widget(self.label_widget)