## 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
self, insight_id: Optional[int] = None, team_id: Optional[int] = None, expected_status: int = status.HTTP_200_OK
    ):
        if team_id is None:
            team_id = self.team.id
        if insight_id is None:
            url = f"/api/projects/{team_id}/insights/activity"
        else:
            url = f"/api/projects/{team_id}/insights/{insight_id}/activity"
        activity = self.client.get(url)
        self.assertEqual(activity.status_code, expected_status)
        return activity.json()
    def assert_insight_activity(self, insight_id: Optional[int], expected: List[Dict]):
        activity_response = self._get_insight_activity(insight_id)
        activity: List[Dict] = activity_response["results"]
        self.maxDiff = None
        self.assertEqual(
            activity, expected,
        )