Kapacitor 1.5.8 has been removed from the Downloads page due to a detected defect that may cause large batch tasks to not fully write points back to InfluxDB, primarily affecting downsampling tasks where information is written to another retention policy. The issue affects users who are currently using version 1.5.8 and strongly recommended to downgrade immediately to Kapacitor 1.5.7 to avoid potential data loss. A resolution for this defect is being worked on, and a release announcement with the fix will be sent out once addressed. Users can contact support or reach out through various channels for assistance.