Did you find solution to that ?
you saved my life man, more than 100 switches, all stopped working; I was having nightmares!
thank you 
searching for ages and this simple click just got it resolved!!!
1000 thanks!!
THANK YOU SO MUCH +1
you saved me a lot of headache
Damnit… I’ve updated my Zigbee2mqtt and those switches didn’t work anymore. I was in the assumption that the update broke them… I’ve been troubleshooting for 2 hours until I noticed this post and remembered that I had to set this when I first started using those switches…
Seems the update deleted/reset that setting… I’ve turned it on again and now they started working again in HA.
You’re looking in the wrong place, plus the property should be named legacy_action_sensor. You should undo your changes and follow the below steps:
- Open up Z2M UI from the left sidebar in HA.
- Click Settings > Home assistant Integrations
- Tick the Home Assistant legacy action sensors option.
- Click Update at the bottom.
this is the way. thank you!