Bug description

This is debatable as to whether its a bug - but I think it could cause a lot of confusion and loss of trust in our product.

I create a funnel and can see 1,875 were successful:

Then I break down by browser and the number is now only 1,746

Expected behavior

I would assume we would show the same number in total from a breakdown or a non-broken down funnel step.

We may be omitting an "other" category which catches the smaller things we didn't break down by?

I'm also curious what's limiting us from having more breakdowns? Could we get 10 rather than limiting to what appears to be 5 today?

How to reproduce

1. Take any funnel step with a significant number of events and break it down by browser
2. https://app.posthog.com/insights?insight=FUNNELS&properties=%5B%5D&filter_test_accounts=true&events=%5B%7B%22id%22%3A%22%24pageview%22%2C%22name%22%3A%22%24pageview%22%2C%22type%22%3A%22events%22%2C%22order%22%3A0%7D%2C%7B%22id%22%3A%22%24pageview%22%2C%22name%22%3A%22%24pageview%22%2C%22type%22%3A%22events%22%2C%22order%22%3A1%7D%2C%7B%22id%22%3A%22%24pageview%22%2C%22name%22%3A%22%24pageview%22%2C%22type%22%3A%22events%22%2C%22order%22%3A2%7D%5D&actions=%5B%5D&interval=day&new_entity=%5B%5D&funnel_viz_type=steps&display=FunnelViz&date_from=-1d&date_to=dStart&breakdown=%24browser&breakdown_type=event

Environment

• PostHog Cloud
• self-hosted PostHog, version/commit: please provide

Additional context

cc: @EDsCODE @alexkim205 @macobo @neilkakkar as this is likely to requires some core experience / core analytics collaboration.

cc: @clarkus for any design considerations here

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