--- a/mobile/android/base/java/org/mozilla/gecko/telemetry/TelemetryCorePingDelegate.java
+++ b/mobile/android/base/java/org/mozilla/gecko/telemetry/TelemetryCorePingDelegate.java
@@ -38,16 +38,19 @@ import java.util.List;
 /**
  * An activity-lifecycle delegate for uploading the core ping.
  */
 public class TelemetryCorePingDelegate extends BrowserAppDelegateWithReference
         implements SearchEngineManager.SearchEngineCallback, AttributionHelperListener {
     private static final String LOGTAG = StringUtils.safeSubstring(
             "Gecko" + TelemetryCorePingDelegate.class.getSimpleName(), 0, 23);
 
+    private static final String TELEMETRY_EXTRA_ONRESUME_ALREADY_CALLED = "onResumeAlreadyCalled";
+    private static final String TELEMETRY_EXTRA_ONPAUSE_CALLED_BEFORE_ONRESUME = "onPauseCalledBeforeOnResume";
+
     private boolean isOnResumeCalled = false;
     private TelemetryDispatcher telemetryDispatcher; // lazy
     private final SessionMeasurements sessionMeasurements = new SessionMeasurements();
 
     @Override
     public void onStart(final BrowserApp browserApp) {
         TelemetryPreferences.initPreferenceObserver(browserApp, GeckoThread.getActiveProfile().getName());
 
@@ -84,24 +87,28 @@ public class TelemetryCorePingDelegate e
 
     private void uploadPing(final BrowserApp browserApp) {
         final SearchEngineManager searchEngineManager = browserApp.getSearchEngineManager();
         searchEngineManager.getEngine(this);
     }
 
     @Override
     public void onResume(BrowserApp browserApp) {
+        if (isOnResumeCalled) {
+            Telemetry.sendUIEvent(TelemetryContract.Event.ACTION, TelemetryContract.Method.SYSTEM, TELEMETRY_EXTRA_ONRESUME_ALREADY_CALLED);
+            return;
+        }
         isOnResumeCalled = true;
         sessionMeasurements.recordSessionStart();
     }
 
     @Override
     public void onPause(BrowserApp browserApp) {
         if (!isOnResumeCalled) {
-            Telemetry.sendUIEvent(TelemetryContract.Event.ACTION, TelemetryContract.Method.SYSTEM, "onPauseCalledBeforeOnResume");
+            Telemetry.sendUIEvent(TelemetryContract.Event.ACTION, TelemetryContract.Method.SYSTEM, TELEMETRY_EXTRA_ONPAUSE_CALLED_BEFORE_ONRESUME);
             return;
         }
         isOnResumeCalled = false;
         // onStart/onStop is ideal over onResume/onPause. However, onStop is not guaranteed to be called and
         // dealing with that possibility adds a lot of complexity that we don't want to handle at this point.
         sessionMeasurements.recordSessionEnd(browserApp);
     }