## 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
with freeze_time("2012-01-14T03:21:34.000Z"):
            for i in range(25):
                _create_event(
                    team=self.team, event="$pageview", distinct_id="1", properties={"$some_property": f"value{i}"},
                )
        with freeze_time("2012-01-15T04:01:34.000Z"):
            response = self.client.get(
                f"/api/projects/{self.team.id}/insights/trend/",
                data={
                    "events": json.dumps([{"id": "$pageview"}]),
                    "breakdown": "$some_property",
                    "breakdown_type": "event",
                },
            )
        self.assertEqual(response.status_code, status.HTTP_200_OK)
        self.assertIn("offset=25", response.json()["next"])
    def test_insight_trends_breakdown_persons_with_histogram(self):