Nexus version: Nexus OSS 3.19.1-01
Nexus creates multiple tasks always on reboot.
one "Cleanup service (Admin - Cleanup repositories using their associated policies)" task and multiple "System - Repository Health Check" tasks (one per active repository).
After a few reboots there are multiple cleanup service tasks and health check tasks as they keep multiplying. And these are a pain to remove one by one from the UI.