Issue with Missing Unique Parameters in Events

Yuli L. · 2025-01-19 09:03:19.068771+00

In about 50% of my events, the unique parameters added are not shown. Is this a known issue?

Issue with Missing Unique Parameters in Events | Mixpanel Community

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kapa.ai
APP
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This issue could be related to a known limitation in Mixpanel's event and property handling. According to the Mixpanel documentation, there are cases where some events or properties may not be exported to the destination, which could explain why you're not seeing unique parameters in about 50% of your events.The documentation states: "This normally happens when you have thousands of unique event names or property names, which is usually an implementation mistake (eg: including a UUID in the event or property name). This causes the export process to exceed table or column limits in the destination. Mixpanel itself imposes a limit of 10K unique properties in your schema after tranformation rules have been applied."Additionally, there are some other factors that could contribute to this issue: 1. Property Limitations: According to the Events FAQ, each event can have up to 255 properties, and property names/values are limited to 255 characters in length.2. Data Truncation: As mentioned in the Common Issues section, Mixpanel truncates all strings down to 255 characters. This could affect your unique parameters if they exceed this limit.3. Hidden Events or Properties: It's possible that some of your events or properties are hidden in Lexicon. As explained in the Hiding Data documentation, hidden entities will not be indexed in your event/properties menu in the query builder.To troubleshoot this issue, you could: 1. Check if you're exceeding the property limits. 2. Verify if any of your properties are being truncated. 3. Look in Lexicon to see if any events or properties are hidden. 4. Use the Events debugging tool to inspect your raw events and confirm if the properties are being sent correctly.If the issue persists after checking these points, it would be advisable to contact Mixpanel support for further assistance, as they can provide more specific guidance based on your project's configuration.
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kapa.ai
APP
·
·
This issue could be related to a known limitation in Mixpanel's event and property handling. According to the Mixpanel documentation, there are cases where some events or properties may not be exported to the destination, which could explain why you're not seeing unique parameters in about 50% of your events.The documentation states: "This normally happens when you have thousands of unique event names or property names, which is usually an implementation mistake (eg: including a UUID in the event or property name). This causes the export process to exceed table or column limits in the destination. Mixpanel itself imposes a limit of 10K unique properties in your schema after tranformation rules have been applied."Additionally, there are some other factors that could contribute to this issue: 1. Property Limitations: According to the Events FAQ, each event can have up to 255 properties, and property names/values are limited to 255 characters in length.2. Data Truncation: As mentioned in the Common Issues section, Mixpanel truncates all strings down to 255 characters. This could affect your unique parameters if they exceed this limit.3. Hidden Events or Properties: It's possible that some of your events or properties are hidden in Lexicon. As explained in the Hiding Data documentation, hidden entities will not be indexed in your event/properties menu in the query builder.To troubleshoot this issue, you could: 1. Check if you're exceeding the property limits. 2. Verify if any of your properties are being truncated. 3. Look in Lexicon to see if any events or properties are hidden. 4. Use the Events debugging tool to inspect your raw events and confirm if the properties are being sent correctly.If the issue persists after checking these points, it would be advisable to contact Mixpanel support for further assistance, as they can provide more specific guidance based on your project's configuration.
kapa.ai is still learning and improving, please let me know how I did by reacting below.
ℹ️ Tip: Mention @kapa.ai in the thread for follow-ups or DM the app for 1-to-1 help.