Summary: Four types of timeline entries did not show in customer timelines.
Details: As part of our Linear integration work we merged a change in the Support App that contained an if condition which incorrectly returned early. This condition was added for a new Linear timeline entry which was feature flagged. The impact was that the following timeline entries were not shown in customer's timelines:

• Notes
• Customer assignment changes (e.g. Customer A was assigned from X to Y)
• Customer status transitions (e.g. Customer A is waiting for help)
• Custom timeline entries
  No data was lost, this was a UI issue.

Impact window: 26 hours and 18 minutes between Feb 27th 1:52PM UTC - Feb 28th 5:10PM UTC