diff --git a/blink/renderer/platform/widget/input/input_handler_proxy.cc b/blink/renderer/platform/widget/input/input_handler_proxy.cc
index 8ad79bb95a293029c54e9f4b4c0e884d4c11869e..422e682ae94ece1ac629462627d4cf7915d3bdd2 100755
--- a/blink/renderer/platform/widget/input/input_handler_proxy.cc
+++ b/blink/renderer/platform/widget/input/input_handler_proxy.cc
@@ -1400,7 +1400,10 @@ InputHandlerProxy::HandleGestureScrollUpdate(
 
   cc::InputHandlerScrollResult scroll_result =
       input_handler_->ScrollUpdate(&scroll_state, delay);
-
+  std::string scroll_result_str = base::StringPrintf("trace_id:%ld pro_dx:%f pro_dy:%f vi_dx:%f vi_dy:%f",
+    trace_id, provided_delta_x, provided_delta_y,
+    scroll_result.current_visual_offset.x(), scroll_result.current_visual_offset.y());
+  OHOS_TRACE_EVENT1("input", "InputHandlerProxy::HandleGestureScrollUpdate_Result", "result", scroll_result_str);
   TRACE_EVENT(
       "input", "InputHandlerProxy::HandleGestureScrollUpdate_Result",
       [trace_id, provided_delta_x, provided_delta_y,
diff --git a/blink/renderer/platform/widget/input/widget_input_handler_manager.cc b/blink/renderer/platform/widget/input/widget_input_handler_manager.cc
index 17ecf03883645e228531eb867e05c3439ed146de..67ddf69b22c88674c0054e5db51bb4c10183f51c 100644
--- a/blink/renderer/platform/widget/input/widget_input_handler_manager.cc
+++ b/blink/renderer/platform/widget/input/widget_input_handler_manager.cc
@@ -672,6 +672,8 @@ void WidgetInputHandlerManager::DispatchEvent(
   }
 
   if (suppress_input && !allow_pre_commit_input_ && !event_is_move) {
+    LOG(INFO) << "WidgetInputHandlerManager::DispatchEvent Dropping input event to defer rendering pipeline phase "
+      << event->Event().GetType();
     if (callback) {
       std::move(callback).Run(mojom::blink::InputEventResultSource::kMainThread,
                               ui::LatencyInfo(),
@@ -747,6 +749,7 @@ void WidgetInputHandlerManager::DispatchEvent(
   if (uses_input_handler_) {
     // If the input_handler_proxy has disappeared ensure we just ack event.
     if (!input_handler_proxy_) {
+      LOG(INFO) << "WidgetInputHandlerManager::DispatchEvent input_handler_proxy_ has disappeared";
       if (callback) {
         std::move(callback).Run(
             mojom::blink::InputEventResultSource::kMainThread,