Fix widget operations in multi_window runtime

winit/src/multi_window.rs

@@ -1272,28 +1272,23 @@ fn run_command<A, C, E>(
                     std::mem::take(ui_caches),
                 );
 
-                'operate: while let Some(mut operation) =
+                while let Some(mut operation) = current_operation.take() {
-                    current_operation.take()
-                {
                     for (id, ui) in uis.iter_mut() {
                         if let Some(window) = window_manager.get_mut(*id) {
                             ui.operate(&window.renderer, operation.as_mut());
+                        }
+                    }
 
                     match operation.finish() {
                         operation::Outcome::None => {}
                         operation::Outcome::Some(message) => {
                             proxy.send(message);
-
-                                    // operation completed, don't need to try to operate on rest of UIs
-                                    break 'operate;
                         }
                         operation::Outcome::Chain(next) => {
                             current_operation = Some(next);
                         }
                     }
                 }
-                    }
-                }
 
                 *ui_caches =
                     uis.drain().map(|(id, ui)| (id, ui.into_cache())).collect();