Failure to store specific event formats for a subset of projects

Incident Report for Mixpanel

Resolved

We identified an issue in the latest versions of our web and mobile SDKs that caused the SDKs to send events to our /track API in a format that our servers failed to ingest.

The issue had a chance to occur when the SDK's identify function was called with the current Distinct ID as an argument (e.g. `mixpanel.identify(mixpanel.get_distinct_id())`), leading to events from that client device session not being properly received by Mixpanel. This issue was most likely to occur with our iOS Swift SDK.

The issue was fully resolved with server-side changes on March 29th, 8:15PM PST. No SDK updates are necessary.

Customers using the latest SDK versions before March 29th could be missing events sent from client devices that encountered this issue.

Posted Mar 29, 2023 - 00:00 PDT