diff --git a/packages/SystemUI/src/com/android/systemui/qs/QSFragment.java b/packages/SystemUI/src/com/android/systemui/qs/QSFragment.java
index e1bca4a42b895..f9eea174ff77d 100644
--- a/packages/SystemUI/src/com/android/systemui/qs/QSFragment.java
+++ b/packages/SystemUI/src/com/android/systemui/qs/QSFragment.java
@@ -413,7 +413,7 @@ public class QSFragment extends LifecycleFragment implements QS, CommandQueue.Ca
             }
         }
         mFooter.setExpansion(onKeyguardAndExpanded ? 1 : expansion);
-        mQSPanelController.getQsTileRevealController().setExpansion(expansion);
+        mQSPanelController.setRevealExpansion(expansion);
         mQSPanelController.getTileLayout().setExpansion(expansion);
         mQSPanelScrollView.setTranslationY(translationScaleY * heightDiff);
         if (fullyCollapsed) {
diff --git a/packages/SystemUI/src/com/android/systemui/qs/QSPanelControllerBase.java b/packages/SystemUI/src/com/android/systemui/qs/QSPanelControllerBase.java
index 0a4151b382101..214904098670b 100644
--- a/packages/SystemUI/src/com/android/systemui/qs/QSPanelControllerBase.java
+++ b/packages/SystemUI/src/com/android/systemui/qs/QSPanelControllerBase.java
@@ -56,7 +56,9 @@ public abstract class QSPanelControllerBase<T extends QSPanel> extends ViewContr
     protected final ArrayList<TileRecord> mRecords = new ArrayList<>();
 
     private int mLastOrientation;
+    private String mCachedSpecs = "";
     private QSTileRevealController mQsTileRevealController;
+    private float mRevealExpansion;
 
     private final QSHost.Callback mQSHostCallback = this::setTiles;
 
@@ -70,7 +72,6 @@ public abstract class QSPanelControllerBase<T extends QSPanel> extends ViewContr
                     }
                 }
             };
-    private String mCachedSpecs = "";
 
     protected QSPanelControllerBase(T view, QSTileHost host,
             QSCustomizerController qsCustomizerController,
@@ -92,6 +93,7 @@ public abstract class QSPanelControllerBase<T extends QSPanel> extends ViewContr
         if (regularTileLayout instanceof PagedTileLayout) {
             mQsTileRevealController = mQsTileRevealControllerFactory.create(
                     (PagedTileLayout) regularTileLayout);
+            mQsTileRevealController.setExpansion(mRevealExpansion);
         }
 
         mView.addOnConfigurationChangedListener(mOnConfigurationChangedListener);
@@ -246,9 +248,12 @@ public abstract class QSPanelControllerBase<T extends QSPanel> extends ViewContr
         }
     }
 
-    /** */
-    public QSTileRevealController getQsTileRevealController() {
-        return mQsTileRevealController;
+    /** Set the expansion on the associated {@link QSTileRevealController}. */
+    public void setRevealExpansion(float expansion) {
+        mRevealExpansion = expansion;
+        if (mQsTileRevealController != null) {
+            mQsTileRevealController.setExpansion(expansion);
+        }
     }
 
     @Override
diff --git a/packages/SystemUI/tests/src/com/android/systemui/qs/QSPanelControllerBaseTest.java b/packages/SystemUI/tests/src/com/android/systemui/qs/QSPanelControllerBaseTest.java
index 64ef6dd90fe17..9421cd0800ff5 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/qs/QSPanelControllerBaseTest.java
+++ b/packages/SystemUI/tests/src/com/android/systemui/qs/QSPanelControllerBaseTest.java
@@ -19,9 +19,12 @@ package com.android.systemui.qs;
 import static org.junit.Assert.assertEquals;
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.ArgumentMatchers.anyBoolean;
+import static org.mockito.ArgumentMatchers.anyFloat;
 import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.Mockito.doAnswer;
 import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.reset;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
@@ -112,8 +115,40 @@ public class QSPanelControllerBaseTest extends SysuiTestCase {
                 mUiEventLogger, mDumpManager);
 
         mController.init();
+        reset(mQSTileRevealController);
     }
 
+    @Test
+    public void testSetRevealExpansion_preAttach() {
+        mController.onViewDetached();
+
+        QSPanelControllerBase<QSPanel> controller = new TestableQSPanelControllerBase(mQSPanel,
+                mQSTileHost, mQSCustomizerController, mQSTileRevealControllerFactory,
+                mMetricsLogger, mUiEventLogger, mDumpManager);
+
+        // Nothing happens until attached
+        controller.setRevealExpansion(0);
+        verify(mQSTileRevealController, never()).setExpansion(anyFloat());
+        controller.setRevealExpansion(0.5f);
+        verify(mQSTileRevealController, never()).setExpansion(anyFloat());
+        controller.setRevealExpansion(1);
+        verify(mQSTileRevealController, never()).setExpansion(anyFloat());
+
+        controller.init();
+        verify(mQSTileRevealController).setExpansion(1);
+    }
+
+    @Test
+    public void testSetRevealExpansion_postAttach() {
+        mController.setRevealExpansion(0);
+        verify(mQSTileRevealController).setExpansion(0);
+        mController.setRevealExpansion(0.5f);
+        verify(mQSTileRevealController).setExpansion(0.5f);
+        mController.setRevealExpansion(1);
+        verify(mQSTileRevealController).setExpansion(1);
+    }
+
+
     @Test
     public void testSetExpanded_Metrics() {
         mController.setExpanded(true);