diff --git a/package-lock.json b/package-lock.json
index bb6095050..b82e8de45 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -437,9 +437,9 @@
       "dev": true
     },
     "@splitsoftware/splitio-commons": {
-      "version": "1.5.0",
-      "resolved": "https://registry.npmjs.org/@splitsoftware/splitio-commons/-/splitio-commons-1.5.0.tgz",
-      "integrity": "sha512-7vBv4Yn+EKaAxJ+9RdKOqJNee+izj6BieG0ZmivWk8fTpKFpcvqKes/Y0kXk0tfOiMmUFV9dRr2xDHRYIf0lnw==",
+      "version": "1.5.1-rc.0",
+      "resolved": "https://registry.npmjs.org/@splitsoftware/splitio-commons/-/splitio-commons-1.5.1-rc.0.tgz",
+      "integrity": "sha512-4XgahrK5lS9pyuNoYaxNfkPIPEWk+SX38UVf2/xyL/roRpwEnI5VyGaVvKZvRzfIsFndkNgHSp+78uM/zCRBSg==",
       "requires": {
         "tslib": "^2.3.1"
       }
@@ -4037,7 +4037,7 @@
     "lodash.defaults": {
       "version": "4.2.0",
       "resolved": "https://registry.npmjs.org/lodash.defaults/-/lodash.defaults-4.2.0.tgz",
-      "integrity": "sha1-0JF4cW/+pN3p5ft7N/bwgCJ0WAw="
+      "integrity": "sha512-qjxPLHd3r5DnsdGacqOMU6pb/avJzdh9tFX2ymgoZE27BmjXrNy/y4LoaiTeAb+O3gL8AfpJGtqfX/ae2leYYQ=="
     },
     "lodash.flatten": {
       "version": "4.4.0",
@@ -4053,7 +4053,7 @@
     "lodash.isarguments": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/lodash.isarguments/-/lodash.isarguments-3.1.0.tgz",
-      "integrity": "sha1-L1c9hcaiQon/AGY7SRwdM4/zRYo="
+      "integrity": "sha512-chi4NHZlZqZD18a0imDHnZPrDeBbTtVN7GXMwuGdRH9qotxAjYs3aVLKc7zNOG9eddR5Ksd8rvFEBc9SsggPpg=="
     },
     "lodash.isequal": {
       "version": "4.5.0",
diff --git a/package.json b/package.json
index 815066319..7d7cf2bfa 100644
--- a/package.json
+++ b/package.json
@@ -32,7 +32,7 @@
     "node": ">=6"
   },
   "dependencies": {
-    "@splitsoftware/splitio-commons": "1.5.0",
+    "@splitsoftware/splitio-commons": "1.5.1-rc.0",
     "@types/google.analytics": "0.0.40",
     "@types/ioredis": "^4.28.0",
     "ioredis": "^4.28.0",
diff --git a/src/__tests__/browser.spec.js b/src/__tests__/browser.spec.js
index 254ff0fc7..73a2b2a32 100644
--- a/src/__tests__/browser.spec.js
+++ b/src/__tests__/browser.spec.js
@@ -122,9 +122,9 @@ tape('## E2E CI Tests ##', function(assert) {
   assert.test('E2E / Readiness', readinessSuite.bind(null, fetchMock));
   /* Validate headers for ip and hostname are not sended with requests (ignore setting IPAddressesEnabled) */
   assert.test('E2E / Ignore setting IPAddressesEnabled', ignoreIpAddressesSettingSuite.bind(null, fetchMock));
-  /* Check that impressions and events are sended to backend via Beacon API or Fetch when page unload is triggered. */
-  assert.test('E2E / Use Beacon API (or Fetch if not available) to send remaining impressions and events when browser page is unload', useBeaconApiSuite.bind(null, fetchMock));
-  assert.test('E2E / Use Beacon API DEBUG (or Fetch if not available) to send remaining impressions and events when browser page is unload', useBeaconDebugApiSuite.bind(null, fetchMock));
+  /* Check that impressions and events are sended to backend via Beacon API or Fetch when pagehide/visibilitychange events are triggered. */
+  assert.test('E2E / Use Beacon API (or Fetch if not available) to send remaining impressions and events when browser page is unload or hidden', useBeaconApiSuite.bind(null, fetchMock));
+  assert.test('E2E / Use Beacon API DEBUG (or Fetch if not available) to send remaining impressions and events when browser page is unload or hidden', useBeaconDebugApiSuite.bind(null, fetchMock));
   /* Validate ready from cache behaviour (might be merged into another suite if we end up having simple behavior around it as expected) */
   assert.test('E2E / Readiness from cache', readyFromCache.bind(null, fetchMock));
   /* Validate readiness with ready promises */
diff --git a/src/__tests__/browserSuites/use-beacon-api.debug.spec.js b/src/__tests__/browserSuites/use-beacon-api.debug.spec.js
index 4615f1cd0..9d604b494 100644
--- a/src/__tests__/browserSuites/use-beacon-api.debug.spec.js
+++ b/src/__tests__/browserSuites/use-beacon-api.debug.spec.js
@@ -5,7 +5,7 @@ import splitChangesMock1 from '../mocks/splitchanges.since.-1.json';
 import mySegmentsFacundo from '../mocks/mysegments.facundo@split.io.json';
 import { DEBUG } from '@splitsoftware/splitio-commons/src/utils/constants';
 import { url } from '../testUtils';
-import { triggerUnloadEvent } from '../testUtils/browser';
+import { triggerPagehideEvent, triggerVisibilitychange } from '../testUtils/browser';
 
 const config = {
   core: {
@@ -61,7 +61,7 @@ const assertCallsToBeaconAPI = (assert) => {
   assertEventSent(assert, parsedPayload.entries[0]);
 };
 
-// This E2E test checks that Beacon API is not called when page unload is triggered and there are not events or impressions to send.
+// This E2E test checks that Beacon API is not called when page is hidden and there are not events or impressions to send.
 function beaconApiNotSendTestDebug(fetchMock, assert) {
   sendBeaconSpyDebug = sinon.spy(window.navigator, 'sendBeacon');
 
@@ -75,8 +75,9 @@ function beaconApiNotSendTestDebug(fetchMock, assert) {
   const client = splitio.client();
   client.on(client.Event.SDK_READY, () => {
 
-    // trigger unload event, without tracked events and impressions
-    triggerUnloadEvent();
+    // trigger events, without tracked events and impressions
+    triggerPagehideEvent();
+    triggerVisibilitychange();
 
     // destroy the client and execute the next E2E test named beaconApiSendTest
     setTimeout(() => {
@@ -90,7 +91,7 @@ function beaconApiNotSendTestDebug(fetchMock, assert) {
   });
 }
 
-// This E2E test checks that impressions and events are sent to backend via Beacon API when page unload is triggered.
+// This E2E test checks that impressions and events are sent to backend via Beacon API when page is hidden.
 function beaconApiSendTestDebug(fetchMock, assert) {
 
   // Init and run Split client
@@ -100,8 +101,8 @@ function beaconApiSendTestDebug(fetchMock, assert) {
     client.getTreatment('hierarchical_splits_test');
     client.track('sometraffictype', 'someEvent', 10);
 
-    // trigger unload event inmmediatly, before scheduled push of events and impressions
-    triggerUnloadEvent();
+    // trigger visibilitychange event inmmediatly, before scheduled push of events and impressions
+    triggerVisibilitychange();
 
     // queue the assertion of the Beacon requests, destroy the client and execute the next E2E test named fallbackTest
     setTimeout(() => {
@@ -115,7 +116,7 @@ function beaconApiSendTestDebug(fetchMock, assert) {
   });
 }
 
-// This E2E test checks that impressions and events are sent to backend via Axios when page unload is triggered and Beacon API is not available.
+// This E2E test checks that impressions and events are sent to backend via Fetch API when page is hidden and Beacon API is not available.
 function fallbackTest(fetchMock, assert) {
 
   // destroy reference to Beacon API
@@ -136,7 +137,7 @@ function fallbackTest(fetchMock, assert) {
     }, 0);
   })();
 
-  // Mock endpoints used by Axios
+  // Mock endpoints
   fetchMock.postOnce(url(settings, '/testImpressions/bulk'), (url, opts) => {
     const resp = JSON.parse(opts.body);
     assert.ok(opts, 'Fallback to /testImpressions/bulk');
@@ -155,8 +156,8 @@ function fallbackTest(fetchMock, assert) {
   client.on(client.Event.SDK_READY, () => {
     client.getTreatment('hierarchical_splits_test');
     client.track('sometraffictype', 'someEvent', 10);
-    // trigger unload event inmmediatly, before scheduled push of events and impressions
-    triggerUnloadEvent();
+    // trigger pagehide event inmmediatly, before scheduled push of events and impressions
+    triggerPagehideEvent();
   });
 }
 
diff --git a/src/__tests__/browserSuites/use-beacon-api.spec.js b/src/__tests__/browserSuites/use-beacon-api.spec.js
index f6c6505fa..d36ceaf45 100644
--- a/src/__tests__/browserSuites/use-beacon-api.spec.js
+++ b/src/__tests__/browserSuites/use-beacon-api.spec.js
@@ -5,7 +5,7 @@ import splitChangesMock1 from '../mocks/splitchanges.since.-1.json';
 import mySegmentsFacundo from '../mocks/mysegments.facundo@split.io.json';
 import { url } from '../testUtils';
 import { OPTIMIZED } from '@splitsoftware/splitio-commons/src/utils/constants';
-import { triggerUnloadEvent } from '../testUtils/browser';
+import { triggerPagehideEvent, triggerVisibilitychange } from '../testUtils/browser';
 
 const config = {
   core: {
@@ -73,7 +73,7 @@ const assertCallsToBeaconAPI = (assert) => {
   assertImpressionsCountSent(assert, parsedPayload.entries);
 };
 
-// This E2E test checks that Beacon API is not called when page unload is triggered and there are not events or impressions to send.
+// This E2E test checks that Beacon API is not called when page is hidden and there are not events or impressions to send.
 function beaconApiNotSendTest(fetchMock, assert) {
   sendBeaconSpy = sinon.spy(window.navigator, 'sendBeacon');
 
@@ -87,8 +87,9 @@ function beaconApiNotSendTest(fetchMock, assert) {
   const client = splitio.client();
   client.on(client.Event.SDK_READY, () => {
 
-    // trigger unload event, without tracked events and impressions
-    triggerUnloadEvent();
+    // trigger events, without tracked events and impressions
+    triggerPagehideEvent();
+    triggerVisibilitychange();
 
     // destroy the client and execute the next E2E test named beaconApiSendTest
     setTimeout(() => {
@@ -102,7 +103,7 @@ function beaconApiNotSendTest(fetchMock, assert) {
   });
 }
 
-// This E2E test checks that impressions and events are sent to backend via Beacon API when page unload is triggered.
+// This E2E test checks that impressions and events are sent to backend via Beacon API when page is hidden.
 function beaconApiSendTest(fetchMock, assert) {
 
   // Init and run Split client
@@ -112,8 +113,9 @@ function beaconApiSendTest(fetchMock, assert) {
     client.getTreatment('hierarchical_splits_test');
     client.track('sometraffictype', 'someEvent', 10);
 
-    // trigger unload event inmmediatly, before scheduled push of events and impressions
-    triggerUnloadEvent();
+    // trigger both events inmmediatly, before scheduled push of events and impressions, to assert that beacon requests are not duplicated
+    triggerPagehideEvent();
+    triggerVisibilitychange();
 
     // queue the assertion of the Beacon requests, destroy the client and execute the next E2E test named fallbackTest
     setTimeout(() => {
@@ -127,7 +129,7 @@ function beaconApiSendTest(fetchMock, assert) {
   });
 }
 
-// This E2E test checks that impressions and events are sent to backend via Axios when page unload is triggered and Beacon API is not available.
+// This E2E test checks that impressions and events are sent to backend via Fetch API when page is hidden and Beacon API is not available.
 function fallbackTest(fetchMock, assert) {
 
   // destroy reference to Beacon API
@@ -149,7 +151,7 @@ function fallbackTest(fetchMock, assert) {
     }, 0);
   })();
 
-  // Mock endpoints used by Axios
+  // Mock endpoints
   fetchMock.postOnce(url(settings, '/testImpressions/bulk'), (url, opts) => {
     const resp = JSON.parse(opts.body);
     assert.ok(opts, 'Fallback to /testImpressions/bulk');
@@ -175,8 +177,9 @@ function fallbackTest(fetchMock, assert) {
   client.on(client.Event.SDK_READY, () => {
     client.getTreatment('hierarchical_splits_test');
     client.track('sometraffictype', 'someEvent', 10);
-    // trigger unload event inmmediatly, before scheduled push of events and impressions
-    triggerUnloadEvent();
+    // trigger both events inmmediatly, before scheduled push of events and impressions, to assert that POST requests are not duplicated
+    triggerPagehideEvent();
+    triggerVisibilitychange();
   });
 }
 
diff --git a/src/__tests__/browserSuites/user-consent.spec.js b/src/__tests__/browserSuites/user-consent.spec.js
index 32ecd90c4..7dd3cad9e 100644
--- a/src/__tests__/browserSuites/user-consent.spec.js
+++ b/src/__tests__/browserSuites/user-consent.spec.js
@@ -1,6 +1,6 @@
 import sinon from 'sinon';
 import { SplitFactory } from '../../';
-import { triggerUnloadEvent } from '../testUtils/browser';
+import { triggerPagehideEvent } from '../testUtils/browser';
 import { nearlyEqual, url } from '../testUtils';
 
 const trackedImpressions = [];
@@ -97,9 +97,9 @@ export default function userConsent(fetchMock, t) {
       ], ['on', 'on', 'on', 'on', 'on', 'on', 'on', 'on'], 'evaluating on SDK ready');
       if (isTracking) expectedTrackedImpressions += 8;
 
-      // Trigger unload event to validate browser listener behaviour
+      // Trigger pagehide event to validate browser listener behaviour
       // Beacon API is used only if user consent is GRANTED
-      triggerUnloadEvent();
+      triggerPagehideEvent();
       if (factory.UserConsent.getStatus() === factory.UserConsent.Status.GRANTED) {
         assert.ok(sendBeaconSpy.calledThrice, 'sendBeacon should have been called thrice');
       } else {
diff --git a/src/__tests__/testUtils/browser.js b/src/__tests__/testUtils/browser.js
index b185e93da..60284923d 100644
--- a/src/__tests__/testUtils/browser.js
+++ b/src/__tests__/testUtils/browser.js
@@ -1,7 +1,19 @@
-// Util method to trigger 'unload' DOM event
-export function triggerUnloadEvent() {
+function triggerEvent(eventName) {
   const event = document.createEvent('HTMLEvents');
-  event.initEvent('unload', true, true);
-  event.eventName = 'unload';
+  event.initEvent(eventName, true, true);
+  event.eventName = eventName;
   window.dispatchEvent(event);
 }
+
+export function triggerUnloadEvent() {
+  triggerEvent('unload');
+}
+
+export function triggerPagehideEvent() {
+  triggerEvent('pagehide');
+}
+
+export function triggerVisibilitychange(state = 'hidden' /* 'hidden' | 'visible' */) {
+  Object.defineProperty(document, 'visibilityState', { value: state, writable: true });
+  document.dispatchEvent(new Event('visibilitychange'));
+}