diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PanelView.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PanelView.java
index d8c99f8..a7ff0bd 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PanelView.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PanelView.java
@@ -372,6 +372,7 @@
     }
 
     protected void onTrackingStarted() {
+        mClosing = false;
         mTracking = true;
         mCollapseAfterPeek = false;
         mBar.onTrackingStarted(PanelView.this);
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/stack/StackScrollAlgorithm.java b/packages/SystemUI/src/com/android/systemui/statusbar/stack/StackScrollAlgorithm.java
index e4a1c27..853628e 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/stack/StackScrollAlgorithm.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/stack/StackScrollAlgorithm.java
@@ -738,8 +738,9 @@
             if (mExpandedOnStart) {
 
                 // We are collapsing the shade, so the first child can get as most as high as the
-                // current height.
-                mFirstChildMaxHeight = mFirstChildWhileExpanding.getActualHeight();
+                // current height or the end value of the animation.
+                mFirstChildMaxHeight = StackStateAnimator.getFinalActualHeight(
+                        mFirstChildWhileExpanding);
             } else {
                 updateFirstChildMaxSizeToMaxHeight();
             }
@@ -801,9 +802,14 @@
         this.mIsExpanded = isExpanded;
     }
 
-    public void notifyChildrenChanged(ViewGroup hostView) {
+    public void notifyChildrenChanged(final ViewGroup hostView) {
         if (mIsExpansionChanging) {
-            updateFirstChildHeightWhileExpanding(hostView);
+            hostView.post(new Runnable() {
+                @Override
+                public void run() {
+                    updateFirstChildHeightWhileExpanding(hostView);
+                }
+            });
         }
     }
 
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/stack/StackStateAnimator.java b/packages/SystemUI/src/com/android/systemui/statusbar/stack/StackStateAnimator.java
index a69390e..433357e 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/stack/StackStateAnimator.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/stack/StackStateAnimator.java
@@ -709,7 +709,7 @@
         };
     }
 
-    private <T> T getChildTag(View child, int tag) {
+    private static <T> T getChildTag(View child, int tag) {
         return (T) child.getTag(tag);
     }
 
@@ -848,4 +848,20 @@
             currentAnimator.cancel();
         }
     }
+
+    /**
+     * Get the end value of the height animation running on a view or the actualHeight
+     * if no animation is running.
+     */
+    public static int getFinalActualHeight(ExpandableView view) {
+        if (view == null) {
+            return 0;
+        }
+        ValueAnimator heightAnimator = getChildTag(view, TAG_ANIMATOR_HEIGHT);
+        if (heightAnimator == null) {
+            return view.getActualHeight();
+        } else {
+            return getChildTag(view, TAG_END_HEIGHT);
+        }
+    }
 }