diff --git a/packages/plugin-ga-events-forwarder-browser/src/helpers.ts b/packages/plugin-ga-events-forwarder-browser/src/helpers.ts
index 328237c9b..44e9ca2da 100644
--- a/packages/plugin-ga-events-forwarder-browser/src/helpers.ts
+++ b/packages/plugin-ga-events-forwarder-browser/src/helpers.ts
@@ -33,9 +33,11 @@ export const parseGA4Events = (url: URL, data?: BodyInit | null): GA4Event[] =>
     return [sharedProperties];
   }
 
+  const separator = data.toString().includes('\n') ? '\n' : '\\r\\';
+
   return data
     .toString()
-    .split('\\r\\')
+    .split(separator)
     .map<GA4Event>((event) => {
       return {
         ...sharedProperties,
@@ -53,25 +55,29 @@ export const parseGA4Events = (url: URL, data?: BodyInit | null): GA4Event[] =>
  * @returns A list of Amplitude events, transformed from Google Analytics events.
  */
 export const transformToAmplitudeEvents = (ga4Events: GA4Event[]): BaseEvent[] =>
-  ga4Events.map<BaseEvent>((ga4Event) => ({
-    event_type: String(ga4Event[GA_PAYLOAD_EVENT_NAME_KEY]),
-    user_id: String(ga4Event[GA_PAYLOAD_USER_ID_KEY]),
-    event_properties: {
-      ...getProperties(ga4Event, GA_PAYLOAD_EVENT_PROPERTY_STRING_PREFIX, GA_PAYLOAD_EVENT_PROPERTY_NUMBER_PREFIX),
-      [AMPLITUDE_EVENT_PROPERTY_MEASUREMENT_ID]: ga4Event[GA_PAYLOAD_TRACKING_ID_KEY],
-    },
-    user_properties: getProperties(
-      ga4Event,
-      GA_PAYLOAD_USER_PROPERTY_STRING_PREFIX,
-      GA_PAYLOAD_USER_PROPERTY_NUMBER_PREFIX,
-    ),
-    // NOTE: Unable to pass an event to track() with custom library value because an internal plugin will overwrite `event.library` value.
-    // Instead, since an enrichment plugin's execute function is performed at a later time. pass an event to track() with library info in `event.extra`,
-    // then enrich `event.library` in this plugin's execute function.
-    extra: {
-      library: AMPLITUDE_EVENT_LIBRARY,
-    },
-  }));
+  ga4Events
+    .filter((ga4Event) => Boolean(ga4Event[GA_PAYLOAD_EVENT_NAME_KEY]))
+    .map<BaseEvent>((ga4Event) => ({
+      event_type: String(ga4Event[GA_PAYLOAD_EVENT_NAME_KEY]),
+      ...(ga4Event[GA_PAYLOAD_USER_ID_KEY] !== null && ga4Event[GA_PAYLOAD_USER_ID_KEY] !== undefined
+        ? { user_id: String(ga4Event[GA_PAYLOAD_USER_ID_KEY]) }
+        : undefined),
+      event_properties: {
+        ...getProperties(ga4Event, GA_PAYLOAD_EVENT_PROPERTY_STRING_PREFIX, GA_PAYLOAD_EVENT_PROPERTY_NUMBER_PREFIX),
+        [AMPLITUDE_EVENT_PROPERTY_MEASUREMENT_ID]: ga4Event[GA_PAYLOAD_TRACKING_ID_KEY],
+      },
+      user_properties: getProperties(
+        ga4Event,
+        GA_PAYLOAD_USER_PROPERTY_STRING_PREFIX,
+        GA_PAYLOAD_USER_PROPERTY_NUMBER_PREFIX,
+      ),
+      // NOTE: Unable to pass an event to track() with custom library value because an internal plugin will overwrite `event.library` value.
+      // Instead, since an enrichment plugin's execute function is performed at a later time. pass an event to track() with library info in `event.extra`,
+      // then enrich `event.library` in this plugin's execute function.
+      extra: {
+        library: AMPLITUDE_EVENT_LIBRARY,
+      },
+    }));
 
 /**
  * @param ga4Event  A list of deserialized Google Analytics events.
diff --git a/packages/plugin-ga-events-forwarder-browser/test/constants.ts b/packages/plugin-ga-events-forwarder-browser/test/constants.ts
index da474a073..60f7819fb 100644
--- a/packages/plugin-ga-events-forwarder-browser/test/constants.ts
+++ b/packages/plugin-ga-events-forwarder-browser/test/constants.ts
@@ -7,7 +7,7 @@ export const MOCK_REGIONAL_URL: string = (() => {
   return regionalUrl.toString();
 })();
 
-export const MOCK_GA_EVENT = {
+export const MOCK_GA_EVENT: Record<string, string | number> = {
   v: '2',
   tid: 'G-DELYSDZ9Q3',
   gtm: '45je3890',
diff --git a/packages/plugin-ga-events-forwarder-browser/test/helpers.test.ts b/packages/plugin-ga-events-forwarder-browser/test/helpers.test.ts
index 55071eaa7..262f2530c 100644
--- a/packages/plugin-ga-events-forwarder-browser/test/helpers.test.ts
+++ b/packages/plugin-ga-events-forwarder-browser/test/helpers.test.ts
@@ -31,7 +31,7 @@ describe('parseGA4Events', () => {
     ]);
   });
 
-  test('should parse ga4 events w/ request body', () => {
+  test('should parse ga4 events w/ request body separated with `\\r\\`', () => {
     const url = new URL(MOCK_URL);
     const data = 'en=page_view&_ee=1\\r\\en=custom_event&_ee=1&epn.1=1&ep.a=a&upn.2=2&up.b=b';
     const result = parseGA4Events(url, data);
@@ -54,6 +54,30 @@ describe('parseGA4Events', () => {
     ]);
   });
 
+  test('should parse ga4 events w/ request body separated with `\n`', () => {
+    const url = new URL(MOCK_URL);
+    const data = `en=page_view&_ee=1
+en=custom_event&_ee=1&epn.1=1&ep.a=a&upn.2=2&up.b=b`;
+    const result = parseGA4Events(url, data);
+
+    expect(result).toEqual([
+      {
+        ...MOCK_GA_EVENT,
+        en: 'page_view',
+        _ee: '1',
+      },
+      {
+        ...MOCK_GA_EVENT,
+        en: 'custom_event',
+        _ee: '1',
+        'ep.a': 'a',
+        'epn.1': '1',
+        'up.b': 'b',
+        'upn.2': '2',
+      },
+    ]);
+  });
+
   describe('transformToAmplitudeEvents', () => {
     test('should transform ga4 events to amplitude events', () => {
       const amplitudeEvent = transformToAmplitudeEvents([
@@ -86,6 +110,46 @@ describe('parseGA4Events', () => {
         },
       ]);
     });
+
+    test('should ignore ga4 events w/o en', () => {
+      const amplitudeEvent = transformToAmplitudeEvents([
+        MOCK_GA_EVENT,
+        // `en` is not defined
+      ]);
+      expect(amplitudeEvent).toEqual([]);
+    });
+
+    test('should handle missing uid', () => {
+      const mockGaEvent: Record<string, string | number> = {
+        ...MOCK_GA_EVENT,
+        en: 'custom_event',
+        _ee: '1',
+        'ep.a': 'a',
+        'epn.1': '1',
+        'up.b': 'b',
+        'upn.2': '2',
+      };
+      delete mockGaEvent.uid;
+
+      const amplitudeEvent = transformToAmplitudeEvents([mockGaEvent]);
+      expect(amplitudeEvent).toEqual([
+        {
+          event_type: 'custom_event',
+          event_properties: {
+            a: 'a',
+            1: 1,
+            [AMPLITUDE_EVENT_PROPERTY_MEASUREMENT_ID]: 'G-DELYSDZ9Q3',
+          },
+          user_properties: {
+            b: 'b',
+            2: 2,
+          },
+          extra: {
+            library: AMPLITUDE_EVENT_LIBRARY,
+          },
+        },
+      ]);
+    });
   });
 
   describe('getProperties', () => {