diff --git a/java/src/com/android/inputmethod/latin/LatinIME.java b/java/src/com/android/inputmethod/latin/LatinIME.java
index c9a42a3a4..d313bbfc4 100644
--- a/java/src/com/android/inputmethod/latin/LatinIME.java
+++ b/java/src/com/android/inputmethod/latin/LatinIME.java
@@ -1825,6 +1825,9 @@ public class LatinIME extends InputMethodService implements KeyboardActionListen
                 // like the smiley key or the .com key.
                 final int length = mEnteredText.length();
                 mConnection.deleteSurroundingText(length, 0);
+                if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
+                    ResearchLogger.latinIME_handleBackspace_cancelTextInput(mEnteredText);
+                }
                 mEnteredText = null;
                 // If we have mEnteredText, then we know that mHasUncommittedTypedChars == false.
                 // In addition we know that spaceState is false, and that we should not be
diff --git a/java/src/com/android/inputmethod/research/ResearchLogger.java b/java/src/com/android/inputmethod/research/ResearchLogger.java
index 56ab90cb4..8e9559431 100644
--- a/java/src/com/android/inputmethod/research/ResearchLogger.java
+++ b/java/src/com/android/inputmethod/research/ResearchLogger.java
@@ -1273,6 +1273,16 @@ public class ResearchLogger implements SharedPreferences.OnSharedPreferenceChang
         researchLogger.commitCurrentLogUnitAsWord(text, Long.MAX_VALUE, isBatchMode);
     }
 
+    /**
+     * Log a revert of onTextInput() (known in the IME as "EnteredText").
+     *
+     * SystemResponse: Remove the LogUnit recording the textInput
+     */
+    public static void latinIME_handleBackspace_cancelTextInput(final String text) {
+        final ResearchLogger researchLogger = getInstance();
+        researchLogger.uncommitCurrentLogUnit(text, true /* dumpCurrentLogUnit */);
+    }
+
     /**
      * Log a call to LatinIME.pickSuggestionManually().
      *