Some customers may have experienced degraded performance in CS-US1 Timeline services between 15:44 and 15:48 UTC on the 28th of July.
A memory issue on multiple web servers led to Timeline becoming unresponsive intermittently, while other servers in the pool continued to serve traffic.
Monitoring systems alerted engineers of a memory issue on Timeline web servers. Engineers quickly made adjustments and redeployed Timeline web servers as a temporary fix.
A permanent hotfix will be deployed in our next release window.