Multiple people have had zwave thermostats migrate which then didn’t work. 
Known issue, engineering is looking into it.
Thermostat problems (multiple brands) Nov 2022
Also, multiple people have had some GE zwave dimmer switches migrate which then didn’t control the level correctly. There is a community-created edge driver for those which does fix the problem.
Jasco/GE Dimmers stopped 'remembering' last setting since migration to stock Edge Driver
it’s not that zwave devices are more likely to have problems—just that people are more likely to post about problems, so those are the examples I’ve seen.