## Bug description

If I mark an insight as a favorite (⭐) and then refresh, the insight is no longer marked as a favorite although it is (can see it in Favorites).

<img width="390" alt="image" src="https://user-images.githubusercontent.com/30181361/182802236-9ecf0531-899c-4f25-ae86-bc233cefdc2f.png">

Note that I'm in the _Favorites_ tab and that _Bug example_ is not starred.
## Environment

- [x] PostHog Cloud
- [ ] self-hosted PostHog, version/commit: please provide

posthog/api/test/test_insight.py
_create_event(team=self.team, event="user signed up", distinct_id="1")
        _create_event(team=self.team, event="user did things", distinct_id="1")
        response = self.client.get(
            f"/api/projects/{self.team.id}/insights/funnel/?funnel_window_days=14&events={json.dumps([{'id': 'user signed up', 'type': 'events', 'order': 0},{'id': 'user did things', 'type': 'events', 'order': 1},])}"
        ).json()
        # 
        self.assertEqual(len(response["result"]), 2)
        self.assertEqual(response["result"][0]["name"], "user signed up")
        self.assertEqual(response["result"][1]["name"], "user did things")
        self.assertEqual(response["timezone"], "UTC")
    def test_insight_retention_basic(self):
        _create_person(team=self.team, distinct_ids=["person1"], properties={"email": "person1@test.com"})
        _create_event(
            team=self.team, event="$pageview", distinct_id="person1", timestamp=timezone.now() - timedelta(days=11),
        )
        _create_event(
            team=self.team, event="$pageview", distinct_id="person1", timestamp=timezone.now() - timedelta(days=10),
        )
        response = self.client.get(f"/api/projects/{self.team.id}/insights/retention/",).json()
        self.assertEqual(len(response["result"]), 11)
    def test_insight_with_specified_token(self):