30 z-wave devices off line

This is just z-wave devices, I have not surveyed sensors. I have a version 2 hub.
What is going on with the z-wave stack that is causing this? I’ve tried removing and repairing devices and this hasn’t helped.
This is NOT acceptable…

Is the problem my hub? Anyone else experiencing this problem?

Someone else reported something similar.

Have you run a Z-Wave network repair lately? If you look at devices in the IDE do you see “Unknown Device” when looking at an offline device’s route?

yes, i don’t have any ghost devices.
lost a thermostat this morning…
the routing done by z-wave repair is dump. hub is in middle of house, z-wave repair will route from one side of house to the other and then to the hub.