I have noticed a number of posts regarding dimmer switches arbitarily locking up, and people assuming it's a problem with their dimmer.
As a backgrounder, I had about 20 old Linear original Z-wave dimmer switches, which about two years ago arbitrarily started slowly going from zero to 100 and back down again, maybe once a month per switch. I assumed it was the old Linear dimmers, and replaced them all (!) with Leviton or GE/Enbrighten Z-Wave plus switches. Now, the dimmers on those same circuits are occasionally arbirtrarily locking up entirely, as you've described here. It only happens on switches that are not on a three-way circuit.
It's totally bizarre, and I can only conclude that there is something that happened in a Hubitat firmware update around 2022 that is causing this to happen. It can't possibly be the switches, since it's three brands on the same circuits. I've tested the voltage and everything is stable and fine. I'll post this separately and reach out to Hubitat as well.
Does anybody have any ideas? The only way to get the switches back working it to reset the breaker. It's extremely annoying.
You should probably stick to one thread instead of posting multiple times. It will help to diagnose the issue if kept in one place.
That said, you should post at least a basic amount of information so we have some idea what hub model, what hub firmware, what dimmer switch models, and preferably screenshots of logs and of the device settings page Events that show this behavior.
The forums aren't littered with posts about this, so I speculate it is something on your end like Alexa Hunches or a rouge rule, or even power quality issues within your home. Again, this is all completely a guess because we have nothing to go on here.
Hmm .... three brands of switches. On the same circuits . There are plenty of folks here who have no issues with z-wave dimmers from Leviton, Jasco, Zooz, and iNovelli.
If I had to start somewhere, I would make sure there isn't a floating neutral or any other mis-wiring issue on those circuits.
