This incident has been resolved.

A fix has been implemented and we are monitoring the results.

We are continuing to investigate this issue.

We are investigating an issue with Personas audience and trait sync failures. The following sync types have been failing since 4:00pm PST
- List destinations (google adwords, fb custom audiences, etc)
- List and event destination syncs from real-time audiences

Once the underlying issue is resolved all data will be delivered; no data has been lost.