I have long enabled the Confluence Usage Stats plugin and our team liked viewing the Global and Space Activity statistics. On May 6 however, all data disappeared. I have not done any upgrade or any major changes to the system.
I did a re-index of the site on May 7 and the Activity page began showing graphs and statistics again. However, we are unable to see records from May 6 and earlier.
What could have caused the disappearance of these records?