it works!!

src/game/mod.rs

@@ -306,6 +306,7 @@ impl TextObject {
                 let size = Dimensions::Dim2d { width: suggested.0, height: suggested.1 };
                 renderer.resize_texture(go, go.textures.texture_index, size);
                 self.brush.resize_texture(suggested.0, suggested.1);
+                self.update_text(new_text, new_size, renderer, game_objects);
             },
         }
     }