diff --git a/src/com/android/launcher3/LauncherRootView.java b/src/com/android/launcher3/LauncherRootView.java
index f26cfe8..28afc57 100644
--- a/src/com/android/launcher3/LauncherRootView.java
+++ b/src/com/android/launcher3/LauncherRootView.java
@@ -4,15 +4,20 @@
 
 import android.annotation.TargetApi;
 import android.content.Context;
+import android.content.res.Resources;
 import android.graphics.Canvas;
+import android.graphics.Insets;
 import android.graphics.Rect;
 import android.os.Build;
 import android.util.AttributeSet;
 import android.view.ViewDebug;
 import android.view.WindowInsets;
 
+import androidx.annotation.RequiresApi;
+
 import com.android.launcher3.graphics.SysUiScrim;
 import com.android.launcher3.statemanager.StatefulActivity;
+import com.android.launcher3.uioverrides.ApiWrapper;
 
 import java.util.Collections;
 import java.util.List;
@@ -61,12 +66,75 @@
 
     @Override
     public WindowInsets onApplyWindowInsets(WindowInsets insets) {
-        mTempRect.set(insets.getSystemWindowInsetLeft(), insets.getSystemWindowInsetTop(),
-                insets.getSystemWindowInsetRight(), insets.getSystemWindowInsetBottom());
+        if (Utilities.ATLEAST_R) {
+            insets = updateInsetsDueToTaskbar(insets);
+            Insets systemWindowInsets = insets.getInsetsIgnoringVisibility(
+                    WindowInsets.Type.systemBars() | WindowInsets.Type.displayCutout());
+            mTempRect.set(systemWindowInsets.left, systemWindowInsets.top, systemWindowInsets.right,
+                    systemWindowInsets.bottom);
+        } else {
+            mTempRect.set(insets.getSystemWindowInsetLeft(), insets.getSystemWindowInsetTop(),
+                    insets.getSystemWindowInsetRight(), insets.getSystemWindowInsetBottom());
+        }
         handleSystemWindowInsets(mTempRect);
         return insets;
     }
 
+    /**
+     * Taskbar provides nav bar and tappable insets. However, taskbar is not attached immediately,
+     * and can be destroyed and recreated. Thus, instead of relying on taskbar being present to
+     * get its insets, we calculate them ourselves so they are stable regardless of whether taskbar
+     * is currently attached.
+     *
+     * TODO(b/198798034): Currently we always calculate nav insets as taskbarSize, but then we
+     * subtract nonOverlappingTaskbarInset in handleSystemWindowInsets(). Instead, we should just
+     * calculate the normal nav bar height here, and remove nonOverlappingTaskbarInset altogether.
+     *
+     * @param oldInsets The system-provided insets, which we are modifying.
+     * @return The updated insets.
+     */
+    @RequiresApi(api = Build.VERSION_CODES.R)
+    private WindowInsets updateInsetsDueToTaskbar(WindowInsets oldInsets) {
+        if (!ApiWrapper.TASKBAR_DRAWN_IN_PROCESS) {
+            // 3P launchers based on Launcher3 should still be inset like normal.
+            return oldInsets;
+        }
+
+        WindowInsets.Builder updatedInsetsBuilder = new WindowInsets.Builder(oldInsets);
+
+        DeviceProfile dp = mActivity.getDeviceProfile();
+        Resources resources = getResources();
+
+        Insets oldNavInsets = oldInsets.getInsets(WindowInsets.Type.navigationBars());
+        Rect newNavInsets = new Rect(oldNavInsets.left, oldNavInsets.top, oldNavInsets.right,
+                oldNavInsets.bottom);
+        if (dp.isTaskbarPresent) {
+            // TODO (see javadoc): Remove this block and fall into the next one instead.
+            newNavInsets.bottom = dp.taskbarSize;
+        } else if (dp.isLandscape) {
+            if (dp.isTablet) {
+                newNavInsets.bottom = ResourceUtils.getNavbarSize(
+                        "navigation_bar_height_landscape", resources);
+            } else {
+                int navWidth = ResourceUtils.getNavbarSize("navigation_bar_width", resources);
+                if (dp.isSeascape()) {
+                    newNavInsets.left = navWidth;
+                } else {
+                    newNavInsets.right = navWidth;
+                }
+            }
+        } else {
+            newNavInsets.bottom = ResourceUtils.getNavbarSize("navigation_bar_height", resources);
+        }
+        updatedInsetsBuilder.setInsets(WindowInsets.Type.navigationBars(), Insets.of(newNavInsets));
+        updatedInsetsBuilder.setInsetsIgnoringVisibility(WindowInsets.Type.navigationBars(),
+                Insets.of(newNavInsets));
+
+        mActivity.updateWindowInsets(updatedInsetsBuilder, oldInsets);
+
+        return updatedInsetsBuilder.build();
+    }
+
     @Override
     public void setInsets(Rect insets) {
         // If the insets haven't changed, this is a no-op. Avoid unnecessary layout caused by
diff --git a/src/com/android/launcher3/allapps/AllAppsContainerView.java b/src/com/android/launcher3/allapps/AllAppsContainerView.java
index ee5f7e4..f30ca1b 100644
--- a/src/com/android/launcher3/allapps/AllAppsContainerView.java
+++ b/src/com/android/launcher3/allapps/AllAppsContainerView.java
@@ -426,8 +426,7 @@
     @Override
     public WindowInsets dispatchApplyWindowInsets(WindowInsets insets) {
         if (Utilities.ATLEAST_Q) {
-            mNavBarScrimHeight = insets.getTappableElementInsets().bottom
-                    - mLauncher.getDeviceProfile().nonOverlappingTaskbarInset;
+            mNavBarScrimHeight = insets.getTappableElementInsets().bottom;
         } else {
             mNavBarScrimHeight = insets.getStableInsetBottom();
         }
diff --git a/src/com/android/launcher3/statemanager/StatefulActivity.java b/src/com/android/launcher3/statemanager/StatefulActivity.java
index 8a35cb3..7a23caa 100644
--- a/src/com/android/launcher3/statemanager/StatefulActivity.java
+++ b/src/com/android/launcher3/statemanager/StatefulActivity.java
@@ -17,11 +17,15 @@
 
 import static com.android.launcher3.LauncherState.FLAG_NON_INTERACTIVE;
 
+import android.graphics.Insets;
+import android.os.Build;
 import android.os.Handler;
 import android.view.LayoutInflater;
 import android.view.View;
+import android.view.WindowInsets;
 
 import androidx.annotation.CallSuper;
+import androidx.annotation.RequiresApi;
 
 import com.android.launcher3.BaseDraggingActivity;
 import com.android.launcher3.LauncherRootView;
@@ -173,4 +177,12 @@
         mHandler.removeCallbacks(mHandleDeferredResume);
         Utilities.postAsyncCallback(mHandler, mHandleDeferredResume);
     }
+
+    /**
+     * Gives subclasses a chance to override some window insets (via
+     * {@link android.view.WindowInsets.Builder#setInsets(int, Insets)}).
+     */
+    @RequiresApi(api = Build.VERSION_CODES.R)
+    public void updateWindowInsets(WindowInsets.Builder updatedInsetsBuilder,
+            WindowInsets oldInsets) { }
 }