diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index fb4a7fd..d09b6b3 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -2392,6 +2392,10 @@
                     } else {
                         Log.d(TAG, desc);
                         getModelWriter().deleteItemFromDatabase(item);
+                        if (TestProtocol.sDebugTracing) {
+                            Log.d(TestProtocol.MISSING_PROMISE_ICON,
+                                    TAG + "bindItems failed for item=" + item);
+                        }
                         continue;
                     }
                 }
diff --git a/src/com/android/launcher3/SessionCommitReceiver.java b/src/com/android/launcher3/SessionCommitReceiver.java
index 558538c..b81637f 100644
--- a/src/com/android/launcher3/SessionCommitReceiver.java
+++ b/src/com/android/launcher3/SessionCommitReceiver.java
@@ -24,12 +24,14 @@
 import android.content.pm.PackageManager;
 import android.os.UserHandle;
 import android.text.TextUtils;
+import android.util.Log;
 
 import androidx.annotation.WorkerThread;
 
 import com.android.launcher3.logging.FileLog;
 import com.android.launcher3.model.ItemInstallQueue;
 import com.android.launcher3.pm.InstallSessionHelper;
+import com.android.launcher3.testing.TestProtocol;
 import com.android.launcher3.util.Executors;
 
 /**
@@ -51,6 +53,9 @@
     private static void processIntent(Context context, Intent intent) {
         if (!isEnabled(context)) {
             // User has decided to not add icons on homescreen.
+            if (TestProtocol.sDebugTracing) {
+                Log.d(TestProtocol.MISSING_PROMISE_ICON, LOG + " not enabled");
+            }
             return;
         }
 
@@ -59,6 +64,9 @@
         if (!PackageInstaller.ACTION_SESSION_COMMITTED.equals(intent.getAction())
                 || info == null || user == null) {
             // Invalid intent.
+            if (TestProtocol.sDebugTracing) {
+                Log.d(TestProtocol.MISSING_PROMISE_ICON, LOG + " invalid intent");
+            }
             return;
         }
 
@@ -68,6 +76,15 @@
                 || info.getInstallReason() != PackageManager.INSTALL_REASON_USER
                 || packageInstallerCompat.promiseIconAddedForId(info.getSessionId())) {
             packageInstallerCompat.removePromiseIconId(info.getSessionId());
+            if (TestProtocol.sDebugTracing) {
+                int id = info.getSessionId();
+                Log.d(TestProtocol.MISSING_PROMISE_ICON, LOG
+                        + ", TextUtils.isEmpty=" + TextUtils.isEmpty(info.getAppPackageName())
+                        + ", info.getInstallReason()=" + info.getInstallReason()
+                        + ", INSTALL_REASON_USER=" + PackageManager.INSTALL_REASON_USER
+                        + ", icon added=" + packageInstallerCompat.promiseIconAddedForId(id)
+                );
+            }
             return;
         }
 
diff --git a/src/com/android/launcher3/model/AddWorkspaceItemsTask.java b/src/com/android/launcher3/model/AddWorkspaceItemsTask.java
index a13fa55..91fb44e 100644
--- a/src/com/android/launcher3/model/AddWorkspaceItemsTask.java
+++ b/src/com/android/launcher3/model/AddWorkspaceItemsTask.java
@@ -22,6 +22,7 @@
 import android.content.pm.LauncherApps;
 import android.content.pm.PackageInstaller.SessionInfo;
 import android.os.UserHandle;
+import android.util.Log;
 import android.util.LongSparseArray;
 import android.util.Pair;
 
@@ -39,6 +40,7 @@
 import com.android.launcher3.model.data.WorkspaceItemInfo;
 import com.android.launcher3.pm.InstallSessionHelper;
 import com.android.launcher3.pm.PackageInstallInfo;
+import com.android.launcher3.testing.TestProtocol;
 import com.android.launcher3.util.GridOccupancy;
 import com.android.launcher3.util.IntArray;
 import com.android.launcher3.util.IntSet;
@@ -82,11 +84,19 @@
                         item.itemType == LauncherSettings.Favorites.ITEM_TYPE_SHORTCUT) {
                     // Short-circuit this logic if the icon exists somewhere on the workspace
                     if (shortcutExists(dataModel, item.getIntent(), item.user)) {
+                        if (TestProtocol.sDebugTracing) {
+                            Log.d(TestProtocol.MISSING_PROMISE_ICON,
+                                    LOG + " Item already on workspace.");
+                        }
                         continue;
                     }
 
                     // b/139663018 Short-circuit this logic if the icon is a system app
                     if (PackageManagerHelper.isSystemApp(app.getContext(), item.getIntent())) {
+                        if (TestProtocol.sDebugTracing) {
+                            Log.d(TestProtocol.MISSING_PROMISE_ICON,
+                                    LOG + " Item is a system app.");
+                        }
                         continue;
                     }
                 }
@@ -126,6 +136,9 @@
                     String packageName = item.getTargetComponent() != null
                             ? item.getTargetComponent().getPackageName() : null;
                     if (packageName == null) {
+                        if (TestProtocol.sDebugTracing) {
+                            Log.d(TestProtocol.MISSING_PROMISE_ICON, LOG + " Null packageName.");
+                        }
                         continue;
                     }
                     SessionInfo sessionInfo = packageInstaller.getActiveSessionInfo(item.user,
@@ -134,6 +147,9 @@
                     if (!packageInstaller.verifySessionInfo(sessionInfo)) {
                         FileLog.d(LOG, "Item info failed session info verification. "
                                 + "Skipping : " + workspaceInfo);
+                        if (TestProtocol.sDebugTracing) {
+                            Log.d(TestProtocol.MISSING_PROMISE_ICON, LOG + "Failed verification.");
+                        }
                         continue;
                     }
 
@@ -144,6 +160,9 @@
                     if (sessionInfo == null) {
                         if (!hasActivity) {
                             // Session was cancelled, do not add.
+                            if (TestProtocol.sDebugTracing) {
+                                Log.d(TestProtocol.MISSING_PROMISE_ICON, LOG + "Session cancelled");
+                            }
                             continue;
                         }
                     } else {
@@ -163,6 +182,9 @@
                             // workspace items as promise icons. At this point we now have the
                             // correct intent to compare against existing workspace icons.
                             // Icon already exists on the workspace and should not be auto-added.
+                            if (TestProtocol.sDebugTracing) {
+                                Log.d(TestProtocol.MISSING_PROMISE_ICON, LOG + "shortcutExists");
+                            }
                             continue;
                         }
 
diff --git a/src/com/android/launcher3/model/ItemInstallQueue.java b/src/com/android/launcher3/model/ItemInstallQueue.java
index 217f523..5a220f7 100644
--- a/src/com/android/launcher3/model/ItemInstallQueue.java
+++ b/src/com/android/launcher3/model/ItemInstallQueue.java
@@ -49,6 +49,7 @@
 import com.android.launcher3.model.data.WorkspaceItemInfo;
 import com.android.launcher3.shortcuts.ShortcutKey;
 import com.android.launcher3.shortcuts.ShortcutRequest;
+import com.android.launcher3.testing.TestProtocol;
 import com.android.launcher3.util.MainThreadInitializedObject;
 import com.android.launcher3.util.PersistedItemArray;
 import com.android.launcher3.util.Preconditions;
@@ -118,10 +119,18 @@
         Launcher launcher = Launcher.ACTIVITY_TRACKER.getCreatedActivity();
         if (launcher == null) {
             // Launcher not loaded
+            if (TestProtocol.sDebugTracing) {
+                Log.d(TestProtocol.MISSING_PROMISE_ICON,
+                        LOG + " flushQueueInBackground launcher not loaded");
+            }
             return;
         }
         ensureQueueLoaded();
         if (mItems.isEmpty()) {
+            if (TestProtocol.sDebugTracing) {
+                Log.d(TestProtocol.MISSING_PROMISE_ICON,
+                        LOG + " flushQueueInBackground no items to load");
+            }
             return;
         }
 
@@ -131,6 +140,10 @@
 
         // Add the items and clear queue
         if (!installQueue.isEmpty()) {
+            if (TestProtocol.sDebugTracing) {
+                Log.d(TestProtocol.MISSING_PROMISE_ICON,
+                        LOG + " flushQueueInBackground launcher addAndBindAddedWorkspaceItems");
+            }
             // add log
             launcher.getModel().addAndBindAddedWorkspaceItems(installQueue);
         }
@@ -191,6 +204,10 @@
         // Queue the item up for adding if launcher has not loaded properly yet
         MODEL_EXECUTOR.post(() -> {
             Pair<ItemInfo, Object> itemInfo = info.getItemInfo(mContext);
+            if (TestProtocol.sDebugTracing) {
+                Log.d(TestProtocol.MISSING_PROMISE_ICON, LOG + " queuePendingShortcutInfo"
+                        + ", itemInfo=" + itemInfo);
+            }
             if (itemInfo == null) {
                 FileLog.d(LOG,
                         "Adding PendingInstallShortcutInfo with no attached info to queue.",
diff --git a/src/com/android/launcher3/pm/InstallSessionHelper.java b/src/com/android/launcher3/pm/InstallSessionHelper.java
index 4b86f65..618f926 100644
--- a/src/com/android/launcher3/pm/InstallSessionHelper.java
+++ b/src/com/android/launcher3/pm/InstallSessionHelper.java
@@ -27,6 +27,7 @@
 import android.os.Process;
 import android.os.UserHandle;
 import android.text.TextUtils;
+import android.util.Log;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.RequiresApi;
@@ -38,6 +39,7 @@
 import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.logging.FileLog;
 import com.android.launcher3.model.ItemInstallQueue;
+import com.android.launcher3.testing.TestProtocol;
 import com.android.launcher3.util.IntArray;
 import com.android.launcher3.util.IntSet;
 import com.android.launcher3.util.MainThreadInitializedObject;
@@ -142,6 +144,16 @@
         if (sessionInfo == null
                 || sessionInfo.getInstallerPackageName() == null
                 || TextUtils.isEmpty(sessionInfo.getAppPackageName())) {
+            if (TestProtocol.sDebugTracing) {
+                Log.d(TestProtocol.MISSING_PROMISE_ICON, LOG + " verify"
+                        + ", info=" + (sessionInfo == null)
+                        + ", info install name" + (sessionInfo == null
+                                ? null
+                                : sessionInfo.getInstallerPackageName())
+                        + ", empty pkg name" + TextUtils.isEmpty((sessionInfo == null
+                                ? null
+                                : sessionInfo.getAppPackageName())));
+            }
             return null;
         }
         String pkg = sessionInfo.getInstallerPackageName();
@@ -211,6 +223,14 @@
      */
     @WorkerThread
     void tryQueuePromiseAppIcon(PackageInstaller.SessionInfo sessionInfo) {
+        if (TestProtocol.sDebugTracing) {
+            Log.d(TestProtocol.MISSING_PROMISE_ICON, LOG + " tryQueuePromiseAppIcon"
+                    + ", FeatureFlags=" + FeatureFlags.PROMISE_APPS_NEW_INSTALLS.get()
+                    + ", SessionCommitReceiveEnabled" + SessionCommitReceiver.isEnabled(mAppContext)
+                    + ", verifySessionInfo(sessionInfo)=" + verifySessionInfo(sessionInfo)
+                    + ", !promiseIconAdded=" + (sessionInfo != null
+                    && !promiseIconAddedForId(sessionInfo.getSessionId())));
+        }
         if (FeatureFlags.PROMISE_APPS_NEW_INSTALLS.get()
                 && SessionCommitReceiver.isEnabled(mAppContext)
                 && verifySessionInfo(sessionInfo)
@@ -227,6 +247,20 @@
     }
 
     public boolean verifySessionInfo(PackageInstaller.SessionInfo sessionInfo) {
+        if (TestProtocol.sDebugTracing) {
+            boolean appNotInstalled = sessionInfo == null
+                    || !new PackageManagerHelper(mAppContext)
+                    .isAppInstalled(sessionInfo.getAppPackageName(), getUserHandle(sessionInfo));
+            boolean labelNotEmpty = sessionInfo != null
+                    && !TextUtils.isEmpty(sessionInfo.getAppLabel());
+            Log.d(TestProtocol.MISSING_PROMISE_ICON, LOG + " verifySessionInfo"
+                    + ", verify(sessionInfo)=" + verify(sessionInfo)
+                    + ", reason=" + (sessionInfo == null ? null : sessionInfo.getInstallReason())
+                    + ", PackageManager.INSTALL_REASON_USER=" + PackageManager.INSTALL_REASON_USER
+                    + ", hasIcon=" + (sessionInfo != null && sessionInfo.getAppIcon() != null)
+                    + ", label is ! empty=" + labelNotEmpty
+                    + " +, app not installed="  + appNotInstalled);
+        }
         return verify(sessionInfo) != null
                 && sessionInfo.getInstallReason() == PackageManager.INSTALL_REASON_USER
                 && sessionInfo.getAppIcon() != null
diff --git a/src/com/android/launcher3/pm/InstallSessionTracker.java b/src/com/android/launcher3/pm/InstallSessionTracker.java
index e1b3c1a..75cf7a8 100644
--- a/src/com/android/launcher3/pm/InstallSessionTracker.java
+++ b/src/com/android/launcher3/pm/InstallSessionTracker.java
@@ -25,10 +25,12 @@
 import android.content.pm.PackageInstaller.SessionInfo;
 import android.os.Build;
 import android.os.UserHandle;
+import android.util.Log;
 import android.util.SparseArray;
 
 import androidx.annotation.WorkerThread;
 
+import com.android.launcher3.testing.TestProtocol;
 import com.android.launcher3.util.PackageUserKey;
 
 import java.lang.ref.WeakReference;
@@ -57,10 +59,19 @@
     public void onCreated(int sessionId) {
         InstallSessionHelper helper = mWeakHelper.get();
         Callback callback = mWeakCallback.get();
+        if (TestProtocol.sDebugTracing) {
+            Log.d(TestProtocol.MISSING_PROMISE_ICON, "Session created sessionId=" + sessionId
+                    + ", callback=" + callback
+                    + ", helper=" + helper);
+        }
         if (callback == null || helper == null) {
             return;
         }
         SessionInfo sessionInfo = pushSessionDisplayToLauncher(sessionId, helper, callback);
+        if (TestProtocol.sDebugTracing) {
+            Log.d(TestProtocol.MISSING_PROMISE_ICON, "Session created sessionId=" + sessionId
+                    + ", sessionInfo=" + sessionInfo);
+        }
         if (sessionInfo != null) {
             callback.onInstallSessionCreated(PackageInstallInfo.fromInstallingState(sessionInfo));
         }
diff --git a/src/com/android/launcher3/testing/TestProtocol.java b/src/com/android/launcher3/testing/TestProtocol.java
index 7c6ad9f..78e9fe8 100644
--- a/src/com/android/launcher3/testing/TestProtocol.java
+++ b/src/com/android/launcher3/testing/TestProtocol.java
@@ -126,4 +126,5 @@
     public static final String TASK_VIEW_ID_CRASH = "b/195430732";
     public static final String NO_DROP_TARGET = "b/195031154";
     public static final String NULL_INT_SET = "b/200572078";
+    public static final String MISSING_PROMISE_ICON = "b/202985412";
 }