Help with periodic Z-wave network functionality loss

[freshcoast]

The latest core add-on and ZUI add-on both use the same version of Z-Wave JS (v15.6.0) and Z-Wave JS Server (3.0.2), so they are practically identical and there’s no reason to think switching would help.

https://zwave-js.github.io/which-version/

You can try and follow this guide but in a reverse fashion if you really want to switch.

[DEPRECATED] Switching Z-Wave JS Addons with Minimal Downtime! Z-Wave JS (Official) to Z-Wave JS UI (Community)

Version 1.0.0 of the Z-Wave JS core app (add-on) includes Z-Wave JS UI, so there is no longer any reason to switch apps (add-ons). Introduction This guide describes how to switch from the Z-Wave JS official add-on to the Z-Wave JS UI HA Community add-on, without losing any downtime caused by the re-interviewing of nodes. In this guide, Z-Wave JS UI will henceforth be abbreviated as ZUI. Who is this guide for? This guide is fo…

The version of HA Core has little relevance to how the add-on behaves, they are separate software, so an upgrade to 2025.6 is most likely not related. Maybe you upgraded the OS or the add-on instead. Restoring a backup might be the quickest way to resolve it if you’re sure it was an upgrade.