## 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
filter_dict = {
            "events": [{"id": "$pageview"}],
            "properties": [{"key": "$browser", "value": "Mac OS X"}],
        }
        Insight.objects.create(
            filters=Filter(data=filter_dict).to_dict(), favorited=True, team=self.team, created_by=self.user,
        )
        
        Insight.objects.create(
            filters=Filter(data=filter_dict).to_dict(), team=self.team, created_by=self.user,
        )
        
        Insight.objects.create(filters=Filter(data=filter_dict).to_dict(), team=self.team)
        response = self.client.get(f"/api/projects/{self.team.id}/insights/?favorited=true&user=true")
        self.assertEqual(response.status_code, status.HTTP_200_OK)
        self.assertEqual(len(response.json()["results"]), 1)
        self.assertEqual((response.json()["results"][0]["favorited"]), True)
    def test_get_insight_in_dashboard_context(self):