## 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": "$pageview"}],
        }
        insight = Insight.objects.create(
            filters=Filter(data=filter_dict).to_dict(), team=self.team, short_id="12345678",
        )
        response = self.client.post(f"/api/projects/{self.team.id}/insights/{insight.id}/viewed")
        self.assertEqual(response.status_code, status.HTTP_201_CREATED)
        created_insight_viewed = InsightViewed.objects.all()[0]
        self.assertEqual(created_insight_viewed.insight, insight)
        self.assertEqual(created_insight_viewed.team, self.team)
        self.assertEqual(created_insight_viewed.user, self.user)
        self.assertEqual(created_insight_viewed.last_viewed_at, datetime(2022, 3, 22, 0, 0, tzinfo=pytz.UTC))
    def test_update_insight_viewed(self):
        filter_dict = {
            "events": [{"id": "$pageview"}],
        }
        insight = Insight.objects.create(
            filters=Filter(data=filter_dict).to_dict(), team=self.team, short_id="12345678",
        )
        with freeze_time("2022-03-22T00:00:00.000Z"):
            response = self.client.post(f"/api/projects/{self.team.id}/insights/{insight.id}/viewed")
            self.assertEqual(response.status_code, status.HTTP_201_CREATED)
        with freeze_time("2022-03-23T00:00:00.000Z"):
            response = self.client.post(f"/api/projects/{self.team.id}/insights/{insight.id}/viewed")
            self.assertEqual(response.status_code, status.HTTP_201_CREATED)
            self.assertEqual(InsightViewed.objects.count(), 1)
            updated_insight_viewed = InsightViewed.objects.all()[0]
            self.assertEqual(updated_insight_viewed.last_viewed_at, datetime(2022, 3, 23, 0, 0, tzinfo=pytz.UTC))
    def test_cant_create_insight_viewed_for_another_team(self):