This is a patch release with many improvements and bug fixes, including a fix to close the event store when the backend restarts, a global rate limit for fetching assets, and fixes for goroutine leaks. Sensu Go 5.19.3 also includes several web UI updates, from fixes to prevent crashes to new color-blindness modes.
Full release notes can be found at:
https://docs.sensu.io/sensu-go/latest/release-notes/#5-19-3-release-notes