diff --git a/packages/insomnia-app/app/common/__tests__/constants.test.js b/packages/insomnia-app/app/common/__tests__/constants.test.js
index c7a6e14e66..536397fe30 100644
--- a/packages/insomnia-app/app/common/__tests__/constants.test.js
+++ b/packages/insomnia-app/app/common/__tests__/constants.test.js
@@ -6,6 +6,7 @@ import {
   ACTIVITY_SPEC,
   ACTIVITY_UNIT_TEST,
   FLEXIBLE_URL_REGEX,
+  isValidActivity,
   isWorkspaceActivity,
 } from '../constants';
 
@@ -35,15 +36,32 @@ describe('URL Regex', () => {
 });
 
 describe('isWorkspaceActivity', () => {
-  it('return true', () => {
+  it('should return true', () => {
     expect(isWorkspaceActivity(ACTIVITY_SPEC)).toBe(true);
     expect(isWorkspaceActivity(ACTIVITY_DEBUG)).toBe(true);
     expect(isWorkspaceActivity(ACTIVITY_UNIT_TEST)).toBe(true);
   });
 
-  it('return false', () => {
+  it('should return false', () => {
     expect(isWorkspaceActivity(ACTIVITY_HOME)).toBe(false);
     expect(isWorkspaceActivity(ACTIVITY_ONBOARDING)).toBe(false);
     expect(isWorkspaceActivity(ACTIVITY_MIGRATION)).toBe(false);
   });
 });
+
+describe('isValidActivity', () => {
+  it('should return true', () => {
+    expect(isValidActivity(ACTIVITY_SPEC)).toBe(true);
+    expect(isValidActivity(ACTIVITY_DEBUG)).toBe(true);
+    expect(isValidActivity(ACTIVITY_UNIT_TEST)).toBe(true);
+    expect(isValidActivity(ACTIVITY_HOME)).toBe(true);
+    expect(isValidActivity(ACTIVITY_ONBOARDING)).toBe(true);
+    expect(isValidActivity(ACTIVITY_MIGRATION)).toBe(true);
+  });
+
+  it('should return false', () => {
+    expect(isValidActivity('something else')).toBe(false);
+    expect(isValidActivity(null)).toBe(false);
+    expect(isValidActivity(undefined)).toBe(false);
+  });
+});
diff --git a/packages/insomnia-app/app/common/constants.js b/packages/insomnia-app/app/common/constants.js
index 515e39001d..e37eccfcfe 100644
--- a/packages/insomnia-app/app/common/constants.js
+++ b/packages/insomnia-app/app/common/constants.js
@@ -174,6 +174,20 @@ export const isWorkspaceActivity = (activity: GlobalActivity): boolean => {
   }
 };
 
+export const isValidActivity = (activity: GlobalActivity): boolean => {
+  switch (activity) {
+    case ACTIVITY_SPEC:
+    case ACTIVITY_DEBUG:
+    case ACTIVITY_UNIT_TEST:
+    case ACTIVITY_HOME:
+    case ACTIVITY_ONBOARDING:
+    case ACTIVITY_MIGRATION:
+      return true;
+    default:
+      return false;
+  }
+};
+
 // HTTP Methods
 export const METHOD_GET = 'GET';
 export const METHOD_POST = 'POST';
diff --git a/packages/insomnia-app/app/ui/redux/modules/__tests__/global.test.js b/packages/insomnia-app/app/ui/redux/modules/__tests__/global.test.js
index 5d7d56644e..e4157b37a6 100644
--- a/packages/insomnia-app/app/ui/redux/modules/__tests__/global.test.js
+++ b/packages/insomnia-app/app/ui/redux/modules/__tests__/global.test.js
@@ -216,6 +216,33 @@ describe('global', () => {
       expect(store.getActions()).toEqual([expectedEvent]);
     });
 
+    it.each(
+      'something',
+      null,
+      undefined,
+    )('should go to home if initialized with an unsupported value: %s', async activity => {
+      const settings = createSettings(true, true);
+
+      const store = mockStore({ global: {}, entities: { settings: [settings] } });
+
+      global.localStorage.setItem(`${LOCALSTORAGE_PREFIX}::activity`, JSON.stringify(activity));
+      const expectedEvent = { type: SET_ACTIVE_ACTIVITY, activity: ACTIVITY_HOME };
+
+      await store.dispatch(initActiveActivity());
+      expect(store.getActions()).toEqual([expectedEvent]);
+    });
+
+    it('should go to home if local storage key not found', async () => {
+      const settings = createSettings(true, true);
+
+      const store = mockStore({ global: {}, entities: { settings: [settings] } });
+
+      const expectedEvent = { type: SET_ACTIVE_ACTIVITY, activity: ACTIVITY_HOME };
+
+      await store.dispatch(initActiveActivity());
+      expect(store.getActions()).toEqual([expectedEvent]);
+    });
+
     it('should go to home if initialized at migration and onboarding seen', async () => {
       const settings = createSettings(true, true);
 
diff --git a/packages/insomnia-app/app/ui/redux/modules/global.js b/packages/insomnia-app/app/ui/redux/modules/global.js
index 134c03207e..c4580823f9 100644
--- a/packages/insomnia-app/app/ui/redux/modules/global.js
+++ b/packages/insomnia-app/app/ui/redux/modules/global.js
@@ -36,6 +36,7 @@ import {
   ACTIVITY_MIGRATION,
   ACTIVITY_ONBOARDING,
   DEPRECATED_ACTIVITY_INSOMNIA,
+  isValidActivity,
 } from '../../../common/constants';
 import { selectSettings } from '../selectors';
 import { getDesignerDataDir } from '../../../common/misc';
@@ -266,6 +267,8 @@ export function goToNextActivity() {
   Go to an explicit activity
  */
 export function setActiveActivity(activity: GlobalActivity) {
+  activity = _normalizeActivity(activity);
+
   // Don't need to await settings update
   switch (activity) {
     case ACTIVITY_MIGRATION:
@@ -680,6 +683,18 @@ function _migrateDeprecatedActivity(activity: GlobalActivity): GlobalActivity {
   return activity === DEPRECATED_ACTIVITY_INSOMNIA ? ACTIVITY_DEBUG : activity;
 }
 
+function _normalizeActivity(activity: GlobalActivity): GlobalActivity {
+  activity = _migrateDeprecatedActivity(activity);
+
+  if (isValidActivity(activity)) {
+    return activity;
+  } else {
+    const fallbackActivity = ACTIVITY_HOME;
+    console.log(`[app] invalid activity "${activity}"; navigating to ${fallbackActivity}`);
+    return fallbackActivity;
+  }
+}
+
 /*
   Initialize with the cached active activity, and navigate to the next activity if necessary
   This will also decide whether to start with the migration or onboarding activities
@@ -700,7 +715,7 @@ export function initActiveActivity() {
       // Nothing here...
     }
 
-    activeActivity = _migrateDeprecatedActivity(activeActivity);
+    activeActivity = _normalizeActivity(activeActivity);
 
     let overrideActivity = null;
     switch (activeActivity) {