I have one of my older switches suddenly stop reporting state. It responds to ON/OFF commands from the HE device page but there's no events being reported. Strange thing is I have not done anything lately, no new devices added.
Zwave settings says it has a direct route to the Hub. I have rebooted the hub once already but will check again on my scheduled reboot tomorrow.
I've had this happen a few times with one of my GE 14291 Z-Wave Plus switches; 'rebooting' the switch works. In my case, pulling the little tab out underneath the paddle was sufficient to get it reporting again.
AFAIK it removes line power from the Z-Wave chipset as well as the load. I've never had to actually trip the breaker on it to get the switch reporting again. It does not reset the switch, inclusion-wise.
Good! I use a 14291 on a whole house fan along with an app to check if there is an open door or window before allowing the fan to switch on; so it's key to know the state of the switch (especially if someone operates it manually) for the rule to work. Luckily it doesn't require a 'reboot' very often.