Use get_family_updaters to test if a mobject should be drawn during every frame of an animation

manimlib/mobject/mobject.py

@@ -173,6 +173,12 @@ class Mobject(Container):
     def get_updaters(self):
         return self.updaters
 
+    def get_family_updaters(self):
+        return list(it.chain(*[
+            sm.get_updaters()
+            for sm in self.get_family()
+        ]))
+
     def add_updater(self, update_function, index=None, call_updater=True):
         if index is None:
             self.updaters.append(update_function)

manimlib/scene/scene.py

@@ -288,7 +288,7 @@ class Scene(Container):
         for i, mob in enumerate(mobjects):
             update_possibilities = [
                 mob in animation_mobjects,
-                len(mob.get_updaters()) > 0,
+                len(mob.get_family_updaters()) > 0,
                 mob in self.foreground_mobjects
             ]
             if any(update_possibilities):