## 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
alt_user = User.objects.create_and_join(self.organization, "team2@posthog.com", None)
        self_user_basic_serialized = {
            "id": self.user.id,
            "uuid": str(self.user.uuid),
            "distinct_id": self.user.distinct_id,
            "first_name": self.user.first_name,
            "email": self.user.email,
        }
        alt_user_basic_serialized = {
            "id": alt_user.id,
            "uuid": str(alt_user.uuid),
            "distinct_id": alt_user.distinct_id,
            "first_name": alt_user.first_name,
            "email": alt_user.email,
        }
        
        
        with freeze_time("2021-08-23T12:00:00Z"):
            response_1 = self.client.post(f"/api/projects/{self.team.id}/insights/")
            self.assertEqual(response_1.status_code, status.HTTP_201_CREATED)
            self.assertDictContainsSubset(
                {