diff --git a/app/scripts/controllers/metametrics-controller.test.ts b/app/scripts/controllers/metametrics-controller.test.ts
index 99ed4d2e2e48..57c49547c28b 100644
--- a/app/scripts/controllers/metametrics-controller.test.ts
+++ b/app/scripts/controllers/metametrics-controller.test.ts
@@ -309,6 +309,7 @@ describe('MetaMetricsController', function () {
           });
 
           const expectedFragment = merge(
+            {},
             SAMPLE_TX_SUBMITTED_PARTIAL_FRAGMENT,
             SAMPLE_PERSISTED_EVENT_NO_ID,
             {
diff --git a/app/scripts/controllers/metametrics-controller.ts b/app/scripts/controllers/metametrics-controller.ts
index e286a3a47d02..27e8ab10de5a 100644
--- a/app/scripts/controllers/metametrics-controller.ts
+++ b/app/scripts/controllers/metametrics-controller.ts
@@ -1,4 +1,5 @@
 import {
+  cloneDeep,
   isEqual,
   memoize,
   merge,
@@ -584,7 +585,8 @@ export default class MetaMetricsController extends BaseController<
       : {};
 
     this.update((state) => {
-      state.fragments[id] = merge(additionalFragmentProps, fragment);
+      // We're cloning "additionalFragmentProps" because it can contain a frozen piece of Immer state
+      state.fragments[id] = merge({}, additionalFragmentProps, fragment);
     });
 
     if (fragment.initialEvent) {