diff --git a/proguard.flags b/proguard.flags
index e556c94..37b8093 100644
--- a/proguard.flags
+++ b/proguard.flags
@@ -50,4 +50,13 @@
 -dontwarn android.graphics.**
 
 # Ignore warnings for hidden utility classes referenced from the shared lib
--dontwarn com.android.internal.util.**
\ No newline at end of file
+-dontwarn com.android.internal.util.**
+
+################ Do not optimize recents lib #############
+-keep class com.android.systemui.** {
+  *;
+}
+
+-keep class com.android.quickstep.** {
+  *;
+}
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/util/RectFSpringAnim.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/util/RectFSpringAnim.java
index c6eafe6..a59c99c 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/util/RectFSpringAnim.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/util/RectFSpringAnim.java
@@ -165,7 +165,7 @@
         mRectYAnim = new FlingSpringAnim(this, RECT_Y, startY, endY, startVelocityY,
                 mMinVisChange, minYValue, maxYValue, springVelocityFactor, onYEndListener);
 
-        float minVisibleChange = 1f / mStartRect.height();
+        float minVisibleChange = Math.abs(1f / mStartRect.height());
         mRectScaleAnim = new SpringAnimation(this, RECT_SCALE_PROGRESS)
                 .setSpring(new SpringForce(1f)
                 .setDampingRatio(SpringForce.DAMPING_RATIO_LOW_BOUNCY)
diff --git a/quickstep/src/com/android/quickstep/RecentsAnimationController.java b/quickstep/src/com/android/quickstep/RecentsAnimationController.java
index 00adfbe..21a4918 100644
--- a/quickstep/src/com/android/quickstep/RecentsAnimationController.java
+++ b/quickstep/src/com/android/quickstep/RecentsAnimationController.java
@@ -81,12 +81,9 @@
             mWindowThresholdCrossed = windowThresholdCrossed;
             UI_HELPER_EXECUTOR.execute(() -> {
                 mController.setAnimationTargetsBehindSystemBars(!windowThresholdCrossed);
-                if (mShouldMinimizeSplitScreen && windowThresholdCrossed) {
-                    // NOTE: As a workaround for conflicting animations (Launcher animating the task
-                    // leash, and SystemUI resizing the docked stack, which resizes the task), we
-                    // currently only set the minimized mode, and not the inverse.
-                    // TODO: Synchronize the minimize animation with the launcher animation
-                    mController.setSplitScreenMinimized(windowThresholdCrossed);
+                SystemUiProxy p = SystemUiProxy.INSTANCE.getNoCreate();
+                if (p != null && mShouldMinimizeSplitScreen) {
+                    p.setSplitScreenMinimized(windowThresholdCrossed);
                 }
             });
         }
diff --git a/quickstep/src/com/android/quickstep/SystemUiProxy.java b/quickstep/src/com/android/quickstep/SystemUiProxy.java
index 101bb07..458d6a9 100644
--- a/quickstep/src/com/android/quickstep/SystemUiProxy.java
+++ b/quickstep/src/com/android/quickstep/SystemUiProxy.java
@@ -295,4 +295,15 @@
             }
         }
     }
+
+    @Override
+    public void setSplitScreenMinimized(boolean minimized) {
+        if (mSystemUiProxy != null) {
+            try {
+                mSystemUiProxy.setSplitScreenMinimized(minimized);
+            } catch (RemoteException e) {
+                Log.w(TAG, "Failed call stopScreenPinning", e);
+            }
+        }
+    }
 }
diff --git a/quickstep/src/com/android/quickstep/TaskThumbnailCache.java b/quickstep/src/com/android/quickstep/TaskThumbnailCache.java
index e47df6c..ace6743 100644
--- a/quickstep/src/com/android/quickstep/TaskThumbnailCache.java
+++ b/quickstep/src/com/android/quickstep/TaskThumbnailCache.java
@@ -17,7 +17,6 @@
 
 import static com.android.launcher3.util.Executors.MAIN_EXECUTOR;
 
-import android.app.ActivityManager;
 import android.content.Context;
 import android.content.res.Resources;
 import android.os.Handler;
@@ -43,9 +42,10 @@
     private final int mCacheSize;
     private final TaskKeyLruCache<ThumbnailData> mCache;
     private final HighResLoadingState mHighResLoadingState;
+    private final boolean mEnableTaskSnapshotPreloading;
 
     public static class HighResLoadingState {
-        private boolean mIsLowRamDevice;
+        private boolean mForceHighResThumbnails;
         private boolean mVisible;
         private boolean mFlingingFast;
         private boolean mHighResLoadingEnabled;
@@ -56,9 +56,9 @@
         }
 
         private HighResLoadingState(Context context) {
-            ActivityManager activityManager =
-                    (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
-            mIsLowRamDevice = activityManager.isLowRamDevice();
+            // If the device does not support low-res thumbnails, only attempt to load high-res
+            // thumbnails
+            mForceHighResThumbnails = !supportsLowResThumbnails();
         }
 
         public void addCallback(HighResLoadingStateChangedCallback callback) {
@@ -85,7 +85,7 @@
 
         private void updateState() {
             boolean prevState = mHighResLoadingEnabled;
-            mHighResLoadingEnabled = !mIsLowRamDevice && mVisible && !mFlingingFast;
+            mHighResLoadingEnabled = mForceHighResThumbnails || (mVisible && !mFlingingFast);
             if (prevState != mHighResLoadingEnabled) {
                 for (int i = mCallbacks.size() - 1; i >= 0; i--) {
                     mCallbacks.get(i).onHighResLoadingStateChanged(mHighResLoadingEnabled);
@@ -100,6 +100,7 @@
 
         Resources res = context.getResources();
         mCacheSize = res.getInteger(R.integer.recentsThumbnailCacheSize);
+        mEnableTaskSnapshotPreloading = res.getBoolean(R.bool.config_enableTaskSnapshotPreloading);
         mCache = new TaskKeyLruCache<>(mCacheSize);
     }
 
@@ -110,7 +111,7 @@
         Preconditions.assertUIThread();
         // Fetch the thumbnail for this task and put it in the cache
         if (task.thumbnail == null) {
-            updateThumbnailInBackground(task.key, true /* reducedResolution */,
+            updateThumbnailInBackground(task.key, true /* lowResolution */,
                     t -> task.thumbnail = t);
         }
     }
@@ -133,8 +134,8 @@
             Task task, Consumer<ThumbnailData> callback) {
         Preconditions.assertUIThread();
 
-        boolean reducedResolution = !mHighResLoadingState.isEnabled();
-        if (task.thumbnail != null && (!task.thumbnail.reducedResolution || reducedResolution)) {
+        boolean lowResolution = !mHighResLoadingState.isEnabled();
+        if (task.thumbnail != null && (!task.thumbnail.reducedResolution || lowResolution)) {
             // Nothing to load, the thumbnail is already high-resolution or matches what the
             // request, so just callback
             callback.accept(task.thumbnail);
@@ -148,23 +149,23 @@
         });
     }
 
-    private ThumbnailLoadRequest updateThumbnailInBackground(TaskKey key, boolean reducedResolution,
+    private ThumbnailLoadRequest updateThumbnailInBackground(TaskKey key, boolean lowResolution,
             Consumer<ThumbnailData> callback) {
         Preconditions.assertUIThread();
 
         ThumbnailData cachedThumbnail = mCache.getAndInvalidateIfModified(key);
-        if (cachedThumbnail != null && (!cachedThumbnail.reducedResolution || reducedResolution)) {
+        if (cachedThumbnail != null && (!cachedThumbnail.reducedResolution || lowResolution)) {
             // Already cached, lets use that thumbnail
             callback.accept(cachedThumbnail);
             return null;
         }
 
         ThumbnailLoadRequest request = new ThumbnailLoadRequest(mBackgroundHandler,
-                reducedResolution) {
+                lowResolution) {
             @Override
             public void run() {
                 ThumbnailData thumbnail = ActivityManagerWrapper.getInstance().getTaskThumbnail(
-                        key.id, reducedResolution);
+                        key.id, lowResolution);
                 if (isCanceled()) {
                     // We don't call back to the provided callback in this case
                     return;
@@ -212,15 +213,31 @@
      * @return Whether to enable background preloading of task thumbnails.
      */
     public boolean isPreloadingEnabled() {
-        return !mHighResLoadingState.mIsLowRamDevice && mHighResLoadingState.mVisible;
+        return mEnableTaskSnapshotPreloading && mHighResLoadingState.mVisible;
     }
 
     public static abstract class ThumbnailLoadRequest extends HandlerRunnable {
-        public final boolean reducedResolution;
+        public final boolean mLowResolution;
 
-        ThumbnailLoadRequest(Handler handler, boolean reducedResolution) {
+        ThumbnailLoadRequest(Handler handler, boolean lowResolution) {
             super(handler, null);
-            this.reducedResolution = reducedResolution;
+            mLowResolution = lowResolution;
         }
     }
+
+    /**
+     * @return Whether device supports low-res thumbnails. Low-res files are an optimization
+     * for faster load times of snapshots. Devices can optionally disable low-res files so that
+     * they only store snapshots at high-res scale. The actual scale can be configured in
+     * frameworks/base config overlay.
+     */
+    private static boolean supportsLowResThumbnails() {
+        Resources res = Resources.getSystem();
+        int resId = res.getIdentifier("config_lowResTaskSnapshotScale", "dimen", "android");
+        if (resId != 0) {
+            return 0 < res.getFloat(resId);
+        }
+        return true;
+    }
+
 }
diff --git a/res/values/config.xml b/res/values/config.xml
index ef34dcd..8aff6da 100644
--- a/res/values/config.xml
+++ b/res/values/config.xml
@@ -117,6 +117,9 @@
     <!-- Recents -->
     <item type="id" name="overview_panel"/>
 
+    <!-- Whether to enable background preloading of task thumbnails. -->
+    <bool name="config_enableTaskSnapshotPreloading">true</bool>
+
     <!-- Configuration resources -->
     <array name="dynamic_resources"> </array>
 </resources>
diff --git a/src/com/android/launcher3/LauncherModel.java b/src/com/android/launcher3/LauncherModel.java
index f618fe1..e61b7a8 100644
--- a/src/com/android/launcher3/LauncherModel.java
+++ b/src/com/android/launcher3/LauncherModel.java
@@ -153,7 +153,7 @@
 
     public void onPackagesRemoved(UserHandle user, String... packages) {
         int op = PackageUpdatedTask.OP_REMOVE;
-        FileLog.d(TAG, "package removed received " + String.join("," + packages));
+        FileLog.d(TAG, "package removed received " + TextUtils.join(",", packages));
         enqueueModelUpdateTask(new PackageUpdatedTask(op, user, packages));
     }
 
diff --git a/src/com/android/launcher3/LauncherState.java b/src/com/android/launcher3/LauncherState.java
index 16be391..36440c9 100644
--- a/src/com/android/launcher3/LauncherState.java
+++ b/src/com/android/launcher3/LauncherState.java
@@ -74,6 +74,10 @@
     public static final int VERTICAL_SWIPE_INDICATOR = 1 << 5;
     public static final int RECENTS_CLEAR_ALL_BUTTON = 1 << 6;
 
+    /** Mask of all the items that are contained in the apps view. */
+    public static final int APPS_VIEW_ITEM_MASK =
+            HOTSEAT_SEARCH_BOX | ALL_APPS_HEADER | ALL_APPS_HEADER_EXTRA | ALL_APPS_CONTENT;
+
     protected static final int FLAG_MULTI_PAGE = 1 << 0;
     protected static final int FLAG_DISABLE_ACCESSIBILITY = 1 << 1;
     protected static final int FLAG_DISABLE_RESTORE = 1 << 2;
diff --git a/src/com/android/launcher3/allapps/AllAppsTransitionController.java b/src/com/android/launcher3/allapps/AllAppsTransitionController.java
index 6aa3efc..e49ff30 100644
--- a/src/com/android/launcher3/allapps/AllAppsTransitionController.java
+++ b/src/com/android/launcher3/allapps/AllAppsTransitionController.java
@@ -2,6 +2,7 @@
 
 import static com.android.launcher3.LauncherState.ALL_APPS_CONTENT;
 import static com.android.launcher3.LauncherState.ALL_APPS_HEADER_EXTRA;
+import static com.android.launcher3.LauncherState.APPS_VIEW_ITEM_MASK;
 import static com.android.launcher3.LauncherState.OVERVIEW;
 import static com.android.launcher3.LauncherState.VERTICAL_SWIPE_INDICATOR;
 import static com.android.launcher3.anim.AnimatorSetBuilder.ANIM_ALL_APPS_FADE;
@@ -203,6 +204,8 @@
         boolean hasHeaderExtra = (visibleElements & ALL_APPS_HEADER_EXTRA) != 0;
         boolean hasAllAppsContent = (visibleElements & ALL_APPS_CONTENT) != 0;
 
+        boolean hasAnyVisibleItem = (visibleElements & APPS_VIEW_ITEM_MASK) != 0;
+
         Interpolator allAppsFade = builder.getInterpolator(ANIM_ALL_APPS_FADE, LINEAR);
         Interpolator headerFade = builder.getInterpolator(ANIM_ALL_APPS_HEADER_FADE, allAppsFade);
         setter.setViewAlpha(mAppsView.getContentView(), hasAllAppsContent ? 1 : 0, allAppsFade);
@@ -213,6 +216,8 @@
 
         setter.setInt(mScrimView, ScrimView.DRAG_HANDLE_ALPHA,
                 (visibleElements & VERTICAL_SWIPE_INDICATOR) != 0 ? 255 : 0, allAppsFade);
+
+        setter.setViewAlpha(mAppsView, hasAnyVisibleItem ? 1 : 0, allAppsFade);
     }
 
     public AnimatorListenerAdapter getProgressAnimatorListener() {
diff --git a/src/com/android/launcher3/popup/ArrowPopup.java b/src/com/android/launcher3/popup/ArrowPopup.java
index 065eb37..1c2acfd 100644
--- a/src/com/android/launcher3/popup/ArrowPopup.java
+++ b/src/com/android/launcher3/popup/ArrowPopup.java
@@ -419,6 +419,8 @@
         }
         if (getOutlineProvider() instanceof RevealOutlineAnimation) {
             ((RevealOutlineAnimation) getOutlineProvider()).getOutline(mEndRect);
+        } else {
+            mEndRect.set(0, 0, getMeasuredWidth(), getMeasuredHeight());
         }
         if (mOpenCloseAnimator != null) {
             mOpenCloseAnimator.cancel();
diff --git a/tests/src/com/android/launcher3/util/rule/FailureInvestigator.java b/tests/src/com/android/launcher3/util/rule/FailureInvestigator.java
index 5880eb6..e4f520f 100644
--- a/tests/src/com/android/launcher3/util/rule/FailureInvestigator.java
+++ b/tests/src/com/android/launcher3/util/rule/FailureInvestigator.java
@@ -102,10 +102,15 @@
             logSinceBoot =
                     UiDevice.getInstance(getInstrumentation())
                             .executeShellCommand("logcat -d -t " + systemBootTime.replace(" ", ""));
-        } catch (IOException e) {
+        } catch (IOException | OutOfMemoryError e) {
             return 0;
         }
 
+        if (matches("android\\:\\:uirenderer\\:\\:renderthread\\:\\:EglManager\\:\\:swapBuffers",
+                logSinceBoot)) {
+            return 148529608;
+        }
+
         for (ExceptionMatch exceptionMatch : EXCEPTION_MATCHES) {
             if (matches(exceptionMatch.exceptionPattern, exception)) {
                 for (LogcatMatch logcatMatch : exceptionMatch.logcatMatches) {