This incident has now been resolved. REST API queries are no longer returning duplicate records for this time period.
Posted Aug 07, 2020 - 01:56 UTC
We are currently resolving an issue with REST API queries for execution, order, and index data sets returning duplicate records for data between 21:00 and 22:00 UTC. There is no impact to the trading platform, and no data has been lost. We apologise for the inconvenience, and will share further updates shortly.