## 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
# 
        dashboard_restricted: Dashboard = Dashboard.objects.create(
            team=self.team, restriction_level=Dashboard.RestrictionLevel.ONLY_COLLABORATORS_CAN_EDIT
        )
        insight_id, response_data = self._create_insight(data={"name": "starts un-restricted dashboard"})
        user_with_permissions = User.objects.create_and_join(
            organization=self.organization, email="with_access_user@posthog.com", password=None,
        )
        DashboardPrivilege.objects.create(
            dashboard=dashboard_restricted,
            user=user_with_permissions,
            level=Dashboard.RestrictionLevel.ONLY_COLLABORATORS_CAN_EDIT,
        )
        self.client.force_login(user_with_permissions)
        response = self.client.patch(
            f"/api/projects/{self.team.id}/insights/{insight_id}", {"dashboards": [dashboard_restricted.id]},
        )
        assert response.status_code == status.HTTP_200_OK
    def test_admin_user_can_add_an_insight_to_a_restricted_dashboard(self):