diff --git a/packages/SystemUI/src/com/android/systemui/biometrics/UdfpsController.java b/packages/SystemUI/src/com/android/systemui/biometrics/UdfpsController.java
index dcb6ea3ef5b7c..1cafb4c2c313e 100644
--- a/packages/SystemUI/src/com/android/systemui/biometrics/UdfpsController.java
+++ b/packages/SystemUI/src/com/android/systemui/biometrics/UdfpsController.java
@@ -342,8 +342,8 @@ class UdfpsController implements DozeReceiver {
                     Log.v(TAG, "showUdfpsOverlay | adding window");
                     mView.setShowReason(reason);
                     mWindowManager.addView(mView, computeLayoutParams());
-                    mIsOverlayShowing = true;
                     mView.setOnTouchListener(mOnTouchListener);
+                    mIsOverlayShowing = true;
                 } catch (RuntimeException e) {
                     Log.e(TAG, "showUdfpsOverlay | failed to add window", e);
                 }
@@ -434,19 +434,21 @@ class UdfpsController implements DozeReceiver {
     }
 
     private void onFingerDown(int x, int y, float minor, float major) {
-        mView.setScrimAlpha(computeScrimOpacity());
-        mView.showScrimAndDot();
-        try {
-            if (mHbmSupported) {
+        if (mHbmSupported) {
+            try {
                 FileWriter fw = new FileWriter(mHbmPath);
                 fw.write(mHbmEnableCommand);
                 fw.close();
+            } catch (IOException e) {
+                mView.hideScrimAndDot();
+                Log.e(TAG, "onFingerDown | failed to enable HBM: " + e.getMessage());
             }
-            mFingerprintManager.onPointerDown(mSensorProps.sensorId, x, y, minor, major);
-        } catch (IOException e) {
-            mView.hideScrimAndDot();
-            Log.e(TAG, "onFingerDown | failed to enable HBM: " + e.getMessage());
         }
+        mView.setScrimAlpha(computeScrimOpacity());
+        mView.setRunAfterShowingScrimAndDot(() -> {
+            mFingerprintManager.onPointerDown(mSensorProps.sensorId, x, y, minor, major);
+        });
+        mView.showScrimAndDot();
     }
 
     private void onFingerUp() {
diff --git a/packages/SystemUI/src/com/android/systemui/biometrics/UdfpsView.java b/packages/SystemUI/src/com/android/systemui/biometrics/UdfpsView.java
index a42ab58487b9a..c2f80d4d2a5ba 100644
--- a/packages/SystemUI/src/com/android/systemui/biometrics/UdfpsView.java
+++ b/packages/SystemUI/src/com/android/systemui/biometrics/UdfpsView.java
@@ -89,6 +89,10 @@ public class UdfpsView extends View implements DozeReceiver,
     private boolean mIsHbmSupported;
     @Nullable private String mDebugMessage;
 
+    // Runnable that will be run after the illumination dot and scrim are shown.
+    // The runnable is reset to null after it's executed once.
+    @Nullable private Runnable mRunAfterShowingScrimAndDot;
+
     public UdfpsView(Context context, AttributeSet attrs) {
         super(context, attrs);
 
@@ -279,6 +283,11 @@ public class UdfpsView extends View implements DozeReceiver,
         }
 
         canvas.restore();
+
+        if (mShowScrimAndDot && mRunAfterShowingScrimAndDot != null) {
+            post(mRunAfterShowingScrimAndDot);
+            mRunAfterShowingScrimAndDot = null;
+        }
     }
 
     RectF getSensorRect() {
@@ -294,6 +303,10 @@ public class UdfpsView extends View implements DozeReceiver,
         postInvalidate();
     }
 
+    void setRunAfterShowingScrimAndDot(Runnable runnable) {
+        mRunAfterShowingScrimAndDot = runnable;
+    }
+
     boolean isValidTouch(float x, float y, float pressure) {
         // The X and Y coordinates of the sensor's center.
         final float cx = mSensorRect.centerX();
diff --git a/packages/SystemUI/tests/src/com/android/systemui/biometrics/UdfpsControllerTest.java b/packages/SystemUI/tests/src/com/android/systemui/biometrics/UdfpsControllerTest.java
index b24f4ab9880d2..c052563b36a5d 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/biometrics/UdfpsControllerTest.java
+++ b/packages/SystemUI/tests/src/com/android/systemui/biometrics/UdfpsControllerTest.java
@@ -106,6 +106,7 @@ public class UdfpsControllerTest extends SysuiTestCase {
     @Captor private ArgumentCaptor<IUdfpsOverlayController> mOverlayCaptor;
     private IUdfpsOverlayController mOverlayController;
     @Captor private ArgumentCaptor<UdfpsView.OnTouchListener> mTouchListenerCaptor;
+    @Captor private ArgumentCaptor<Runnable> mRunAfterShowingScrimAndDotCaptor;
 
     @Before
     public void setUp() {
@@ -190,11 +191,14 @@ public class UdfpsControllerTest extends SysuiTestCase {
         MotionEvent event = MotionEvent.obtain(0, 0, MotionEvent.ACTION_DOWN, 0, 0, 0);
         mTouchListenerCaptor.getValue().onTouch(mUdfpsView, event);
         event.recycle();
-        // THEN the event is passed to the FingerprintManager
+        // THEN the scrim and dot is shown
+        verify(mUdfpsView).showScrimAndDot();
+        // AND a runnable that passes the event to FingerprintManager is set on the view
+        verify(mUdfpsView).setRunAfterShowingScrimAndDot(
+                mRunAfterShowingScrimAndDotCaptor.capture());
+        mRunAfterShowingScrimAndDotCaptor.getValue().run();
         verify(mFingerprintManager).onPointerDown(eq(mUdfpsController.mSensorProps.sensorId), eq(0),
                 eq(0), eq(0f), eq(0f));
-        // AND the scrim and dot is shown
-        verify(mUdfpsView).showScrimAndDot();
     }
 
     @Test
@@ -205,11 +209,14 @@ public class UdfpsControllerTest extends SysuiTestCase {
         mFgExecutor.runAllReady();
         // WHEN fingerprint is requested because of AOD interrupt
         mUdfpsController.onAodInterrupt(0, 0, 2f, 3f);
-        // THEN the event is passed to the FingerprintManager
+        // THEN the scrim and dot is shown
+        verify(mUdfpsView).showScrimAndDot();
+        // AND a runnable that passes the event to FingerprintManager is set on the view
+        verify(mUdfpsView).setRunAfterShowingScrimAndDot(
+                mRunAfterShowingScrimAndDotCaptor.capture());
+        mRunAfterShowingScrimAndDotCaptor.getValue().run();
         verify(mFingerprintManager).onPointerDown(eq(mUdfpsController.mSensorProps.sensorId), eq(0),
                 eq(0), eq(3f) /* minor */, eq(2f) /* major */);
-        // AND the scrim and dot is shown
-        verify(mUdfpsView).showScrimAndDot();
     }
 
     @Test