From 2025-08-01 04:19 UTC to 2025-08-04 07:44 UTC, users experienced incorrect filter application when navigating from pie charts on dashboards to inventory views. Specifically, clicking on pie chart segments applied wrong or empty filters, causing inventory results to be incomplete or missing.
During this time, users were advised to manually reapply filters as a workaround. This issue was isolated to pie charts; other chart types, such as column and horizontal bar charts, were unaffected.
The root cause was identified as a breaking behavioral change introduced in Highcharts v12, where pie chart categories switched from string labels to numeric indexes by default. Our filtering logic used these category values to apply filters during navigation, but received numeric indexes instead of meaningful filter keys.
The fix updated chart click handlers to use the explicit category field from chart point options, restoring correct filter behavior. This update was tested across all chart types and deployed successfully on 2025-08-04 07:44 UTC.
The incident resulted from an undocumented change in a third-party library during a major version upgrade. Our filtering logic was designed around the previous behavior, which went unnoticed during testing. This caused filter failures for pie chart interactions only.