Release 22.0.4 is the latest stable release of OpenNMS Horizon.
It contains a number of bug fixes and enhancements, including fixes in upgrades, flows, date handling, topology UI performance, and minion management.
For a high-level overview of what’s changed in OpenNMS 22, see What’s New in OpenNMS 22.
For a complete list of changes in 22.0.4 see the release notes.