That really seems like a device causing a mesh issue, not that it is, but it is behaving like one.
When you are having issues, is Zwave still online in the Zwave settings page? Have you noticed any device that stops responding before others? That can provide a clue if there is a bad devices starting the a cascading network issue.
I found that my trouble device that was killing my mesh were seen the the Zwave logs from the settings page, as having no transmission data. It appears that the bad device would stop acting as a repeater, and other devices were still trying to repeat though it.
You can look at Zwave mesh troubleshooting guides in this forum. The search on here is not very helpful, so I just have Gemini find posts for me. Here is what it came back with:
Top community discussions and troubleshooting topics for Z-Wave mesh include:
- Removing "Ghost" Nodes: The community emphasizes clearing ghost devices (unreachable or deleted devices still clinging to the mesh) as a priority. Users find success by hitting the Refresh button on the Z-Wave Details page until the Remove button appears. For detailed steps, check the Z-Wave Ghost Issues Discussion. [1, 2]
- General Mesh Deterioration: If your mesh is losing stability, users suggest checking for dead nodes, updating your hub's Z-Wave firmware, and avoiding full network repairs. You can review user suggestions in the Z-Wave Mesh Deterioration Thread. [1, 2, 3]
- Unresponsive Radios: When the entire Z-Wave network stops responding, the community recommends full power cycles and investigating rogue devices that might be flooding the radio. Read more in the Z-Wave Unresponsive Network Discussion or the Z-Wave Devices Unresponsive After Update Topic. [1, 2, 3]
- Mesh Analysis Tools: For advanced visualization and statistics, users recommend the community-made Z-Wave Mesh Details app, frequently referenced in the Help Debugging Unreliable Mesh Thread.