Formulas and Breakdowns don't work together

[marcushyett-ph]

Bug description

I've created a trend with a breakdown and a formula, I get an error

Expected behavior

I would expect to see the results of the formula broken down by the attribute I selected

How to reproduce

1. https://app.posthog.com/insights/YbLu3MNB/edit?insight=TRENDS&interval=day&display=ActionsBarValue&actions=%5B%5D&events=%5B%7B%22id%22%3A%22insight%20analyzed%22%2C%22name%22%3A%22insight%20analyzed%22%2C%22type%22%3A%22events%22%2C%22order%22%3A0%7D%2C%7B%22id%22%3A%22insight%20analyzed%22%2C%22type%22%3A%22events%22%2C%22order%22%3A1%2C%22name%22%3A%22insight%20analyzed%22%2C%22math%22%3A%22dau%22%7D%5D&properties=%5B%5D&filter_test_accounts=true&breakdown=insight&breakdown_type=event&new_entity=%5B%5D&formula=B%2FA

Environment

• PostHog Cloud
• self-hosted PostHog (ClickHouse-based), version/commit: please provide
• self-hosted PostHog (Postgres-based, legacy), version/commit: please provide

Additional context

Thank you for your bug report – we love squashing them!

[tiina303]

This is what the user would see, which leaves an impression that our app is broken

[sentry-io]

Sentry issue: POSTHOG-8XX