diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationPanelViewController.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationPanelViewController.java
index 138989c04f0ee..d36fae199072f 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationPanelViewController.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationPanelViewController.java
@@ -34,6 +34,9 @@ import static com.android.systemui.statusbar.StatusBarState.KEYGUARD;
 import static com.android.systemui.statusbar.StatusBarState.SHADE;
 import static com.android.systemui.statusbar.StatusBarState.SHADE_LOCKED;
 import static com.android.systemui.statusbar.notification.stack.NotificationStackScrollLayout.ROWS_ALL;
+import static com.android.systemui.statusbar.phone.PanelBar.STATE_CLOSED;
+import static com.android.systemui.statusbar.phone.PanelBar.STATE_OPEN;
+import static com.android.systemui.statusbar.phone.PanelBar.STATE_OPENING;
 
 import static java.lang.Float.isNaN;
 
@@ -79,6 +82,7 @@ import android.view.ViewPropertyAnimator;
 import android.view.ViewStub;
 import android.view.ViewTreeObserver;
 import android.view.WindowInsets;
+import android.view.accessibility.AccessibilityEvent;
 import android.view.accessibility.AccessibilityManager;
 import android.view.accessibility.AccessibilityNodeInfo;
 import android.widget.FrameLayout;
@@ -4624,9 +4628,21 @@ public class NotificationPanelViewController extends PanelViewController {
     }
 
     private final PanelBar.PanelStateChangeListener mPanelStateChangeListener =
-            state -> {
-                mAmbientState.setIsShadeOpening(state == PanelBar.STATE_OPENING);
-                updateQSExpansionEnabledAmbient();
+            new PanelBar.PanelStateChangeListener() {
+
+                @PanelBar.PanelState
+                private int mCurrentState = STATE_CLOSED;
+
+                @Override
+                public void onStateChanged(@PanelBar.PanelState int state) {
+                    mAmbientState.setIsShadeOpening(state == STATE_OPENING);
+                    updateQSExpansionEnabledAmbient();
+
+                    if (state == STATE_OPEN && mCurrentState != state) {
+                        mView.sendAccessibilityEvent(AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED);
+                    }
+                    mCurrentState = state;
+                }
             };
 
     public PanelBar.PanelStateChangeListener getPanelStateChangeListener() {
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PanelBar.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PanelBar.java
index 4b9d5ec140561..430edfdd9d19d 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PanelBar.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PanelBar.java
@@ -54,7 +54,7 @@ public abstract class PanelBar extends FrameLayout {
     public static final int STATE_OPENING = 1;
     public static final int STATE_OPEN = 2;
 
-    PanelViewController mPanel;
+    private PanelViewController mPanel;
     @Nullable private PanelStateChangeListener mPanelStateChangeListener;
     private int mState = STATE_CLOSED;
     private boolean mTracking;
@@ -178,7 +178,6 @@ public abstract class PanelBar extends FrameLayout {
         }
         if (fullyOpened && !mTracking) {
             go(STATE_OPEN);
-            onPanelFullyOpened();
         } else if (fullyClosed && !mTracking && mState != STATE_CLOSED) {
             go(STATE_CLOSED);
             onPanelCollapsed();
@@ -219,10 +218,6 @@ public abstract class PanelBar extends FrameLayout {
         if (DEBUG) LOG("onPanelCollapsed");
     }
 
-    public void onPanelFullyOpened() {
-        if (DEBUG) LOG("onPanelFullyOpened");
-    }
-
     public void onTrackingStarted() {
         mTracking = true;
     }
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBarView.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBarView.java
index 9ab6cdd3053bc..815f6fe850225 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBarView.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBarView.java
@@ -56,7 +56,6 @@ public class PhoneStatusBarView extends PanelBar {
 
     StatusBar mBar;
 
-    boolean mIsFullyOpenedPanel = false;
     private ScrimController mScrimController;
     private float mMinFraction;
     private Runnable mHideExpandedRunnable = new Runnable() {
@@ -216,22 +215,12 @@ public class PhoneStatusBarView extends PanelBar {
         super.onPanelCollapsed();
         // Close the status bar in the next frame so we can show the end of the animation.
         post(mHideExpandedRunnable);
-        mIsFullyOpenedPanel = false;
     }
 
     public void removePendingHideExpandedRunnables() {
         removeCallbacks(mHideExpandedRunnable);
     }
 
-    @Override
-    public void onPanelFullyOpened() {
-        super.onPanelFullyOpened();
-        if (!mIsFullyOpenedPanel) {
-            mPanel.getView().sendAccessibilityEvent(AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED);
-        }
-        mIsFullyOpenedPanel = true;
-    }
-
     @Override
     public boolean onTouchEvent(MotionEvent event) {
         boolean barConsumedEvent = mBar.interceptTouchEvent(event);