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很抱歉，知識來源中並沒有足夠的資訊可以解釋為什麼某些 project 到 6 月才開始受到影響。 可能的原因包括分批推出（rolling rollout）等，但我無法根據現有知識來源確認這一點。建議您直接聯繫 Mixpanel Support 詢問您的 project 具體的遷移時間，他們能提供更準確的說明。

根據知識來源，這項改動是在 2026 年 4 月推出的。 原本 Classified Data Access 是透過 Project Users 頁面上獨立的 per-user toggle 來管理，管理員可以單獨為每位使用者開啟或關閉查看敏感資料的權限。Custom Roles 推出後，Classified Data Access 改為 Data Access, Exports, and Alerts 類別下的一個權限項目，統一在 role 的設定中管理，不再是獨立的 toggle。[Classified Data Access 變更] 值得注意的是，改動後任何預設 role（包含 Owner 和 Admin）預設都不具備查看 Classified Data 的權限，必須透過 Custom Role 明確授予。因此您看到的 Consumer + Sensitive Access 顯示方式，本質上就是 Consumer role 加上透過 Custom Role 明確賦予的 Classified Data Access 權限。[Classified Data Access 變更]

There are a couple of ways to visualize this in Mixpanel:

You can build a funnel that excludes users who performed "Subscription Cancelled" before reaching your target event:

This will show you only users who went through the funnel without triggering "Subscription Cancelled" in between. [Exclusion Steps]

You can create a cohort of users who match your criteria and then use it to filter a report:

Once you have your funnel or cohort set up, you can click any data point and select "View Users" to see the specific users contributing to that metric, save them as a cohort, or export them to CSV. [View Users] The Funnel + Exclusion Step approach is likely the most direct visualization, as it clearly shows conversion rates and the impact of excluding users who cancelled.

You can achieve this using Custom Events. By combining "Product X Viewed" and "Product Y Viewed" into a single custom event, that custom event can then serve as Step 2 in your funnel. Here's how to do it:

Any user who fires either event will be counted as having completed Step 2. [Custom Events] [Funnels FAQ] Your funnel would then look like:

If you want to compare conversion rates to each event separately (rather than combining them), you can use the Event Comparison feature. Click the "…" menu on a funnel step and select "Event Comparison" to add multiple events at the same step and see segmented results. [Comparison Events]

Note: Custom Events are the right choice if you want users completing either event to count toward the same step. Custom Events can also be reused across other reports like Retention, Flows, and cohort definitions. [Custom Events]

The knowledge sources don't provide a dedicated pros/cons breakdown specifically for the RudderStack–Mixpanel integration, but based on the general CDP and tracking method information available, here's what can be gathered:

For detailed setup instructions, refer to the RudderStack documentation or Mixpanel's RudderStack integration page.

Based on the knowledge sources, this sounds like you want to use the if function in a Custom Property formula. Here's how:

If you want: "If Property 1 = True, then True":

if(<Property 1> == true, true, false)

You can chain conditions using and / or:

if(<Property 1> == true and <Property 2> == "some value", true, false)

Or use ifs for multiple checks:

ifs(
  <Property 1> == true, "Condition A",
  <Property 1> == false, "Condition B"
)

Note: Custom Event Properties can reference both event and user profile properties in the formula. Custom Profile Properties can only reference user profile properties. [Custom Properties]

A few things to check:

Beyond that, the knowledge sources don't provide more detail on why "Custom Event Property" might be missing as an option specifically. I'd recommend checking Mixpanel's support or community forums for further troubleshooting if the above doesn't resolve it.

You can create a custom event property directly within a report using the property builder:

Note: Free plan users can create custom properties locally within a report. Saving globally for reuse requires a Growth or Enterprise plan. [Custom Properties]

If you need a property from a prior event to appear on a future event (e.g., using a "Search term" from a "Product Searched" event on a "Purchase Completed" event), you can use the Borrowed Property feature when creating your custom event property. Each project supports up to 20 borrowed properties. [Borrowed Properties]

I want to be upfront that the knowledge sources don't contain enough detail to confirm the exact steps for creating a grouped bar chart with two simultaneous breakdown levels (Step 1 value AND Step 2 value) in a single Insights report. What the knowledge sources do confirm is relevant here:

The closest approach within what the knowledge sources describe would be:

However, I'm not confident that Funnels supports a grouped bar chart output in the same visual style as Insights bar charts, or that two simultaneous per-step breakdowns are supported in the way you're describing.

Given the complexity of what you're describing — a grouped bar chart with two different step-attributed property values — I'd suggest reaching out to Mixpanel Support or consulting the Mixpanel Community directly, as this goes beyond what the available knowledge sources can definitively confirm.

You can handle this directly in Mixpanel using Typecasting, without needing to change anything in your integration (e.g. Userflow). [typecasting]

This forces Mixpanel to interpret the string value as a numeric type, enabling calculations like sum, average, median, and percentile. [typecasting]

If star_rating is being sent as a string (e.g. "4") by Userflow:

If you want the property to always behave as a number without manually typecasting each time, the best options are: