I have a zooz zen22 with the latest firmware. It s configured in a 3 way mode with another regular switch and it s being working great for years until recently. It stopped being operated from the switch itself. I can control the light from the HA or Alexa but not from both switches.
What I did to solve this issue:
- Check the switch and tighten the cables
- Swap the zen22 with ge switch
- checked the little thing at the bottom of the switch that disactivate the switch
Years ago I followed this video from DIY Smart Home Guy