[Experiment] Ignore the persisted tab (#3442)

src/state/shell/selected-feed.tsx

@@ -1,14 +1,16 @@
 import React from 'react'
-import * as persisted from '#/state/persisted'
+
+import {useGate} from '#/lib/statsig/statsig'
 import {isWeb} from '#/platform/detection'
+import * as persisted from '#/state/persisted'
 
 type StateContext = string
 type SetContext = (v: string) => void
 
 const stateContext = React.createContext<StateContext>('home')
 const setContext = React.createContext<SetContext>((_: string) => {})
 
-function getInitialFeed() {
+function getInitialFeed(startSessionWithFollowing: boolean) {
   if (isWeb) {
     if (window.location.pathname === '/') {
       const params = new URLSearchParams(window.location.search)
@@ -24,16 +26,21 @@ function getInitialFeed() {
       return feedFromSession
     }
   }
-  const feedFromPersisted = persisted.get('lastSelectedHomeFeed')
-  if (feedFromPersisted) {
-    // Fall back to the last chosen one across all tabs.
-    return feedFromPersisted
+  if (!startSessionWithFollowing) {
+    const feedFromPersisted = persisted.get('lastSelectedHomeFeed')
+    if (feedFromPersisted) {
+      // Fall back to the last chosen one across all tabs.
+      return feedFromPersisted
+    }
   }
   return 'home'
 }
 
 export function Provider({children}: React.PropsWithChildren<{}>) {
-  const [state, setState] = React.useState(getInitialFeed)
+  const startSessionWithFollowing = useGate('start_session_with_following')
+  const [state, setState] = React.useState(() =>
+    getInitialFeed(startSessionWithFollowing),
+  )
 
   const saveState = React.useCallback((feed: string) => {
     setState(feed)