The release notes link from this site is dead.
The link you need is: https://www.silabs.com/documents/public/release-notes/SRN14889-7.18.3.0.pdf
But I’ll save you the trouble, the release notes should just say, “ZWave is not a completely reliable technology for home automation, don’t buy it.”
@daphatty summed it all up pretty well at the end of this thread: Automate ZwaveJS Ping Dead Nodes?