diff --git a/src/proxy/index.ts b/src/proxy/index.ts
index b2c09d4e9..0bde5dbc0 100644
--- a/src/proxy/index.ts
+++ b/src/proxy/index.ts
@@ -211,7 +211,7 @@ export default class Proxy extends Router {
         const windowId    = refererDest && refererDest.windowId || void 0;
 
         if (session) {
-            session.options.referer = referer || session.options.referer;
+            if (!isIframe) session.options.referer = referer || session.options.referer;
 
             res.setHeader(BUILTIN_HEADERS.contentType, 'application/x-javascript');
             addPreventCachingHeaders(res);
diff --git a/test/server/proxy/regression-test.js b/test/server/proxy/regression-test.js
index 40b179fb0..97fa3f333 100644
--- a/test/server/proxy/regression-test.js
+++ b/test/server/proxy/regression-test.js
@@ -1591,6 +1591,33 @@ describe('Regression', () => {
             });
     });
 
+    it('Should not alter referer after the iframe task (GH-7376)', async () => {
+        session.getPayloadScript       = async () => 'PayloadScript';
+        session.getIframePayloadScript = async () => 'IframePayloadScript';
+
+        const expectedReferer = getProxyUrl('http://example.com/');
+
+        await request({
+            headers: {
+                referer: proxy.openSession('http://example.com', session),
+            },
+            url:                     'http://localhost:1836/task.js',
+            resolveWithFullResponse: true,
+        });
+
+        expect(session.options.referer).eql(expectedReferer);
+
+        await request({
+            headers: {
+                referer: proxy.openSession('http://iframe.example.com', session),
+            },
+            url:                     'http://localhost:1836/iframe-task.js',
+            resolveWithFullResponse: true,
+        });
+
+        expect(session.options.referer).eql(expectedReferer);
+    });
+
     it('Should use `referrer` from the session options if it is not existed in request (GH-6295)', () => {
         const req        = {
             url:     getProxyUrl('http://example.com/'),