I'm having similiar behaviour with my C8 pro since the last update. Some automation won't trigger or if triggered devices won't turn on or off.
Also zigbee devices are getting a command to change state but are not responding. It's looks like the zigbee network or radio is not working properly - this all started after the last update. Before the update everything worked flawlessly...
I don't know what to do... I am afraid to rollback (it can make the hub to work worse then now), I don't know if the next verion will fix something, I don't know if I need to do something with the zigbee radio (change frequency or similar)...
PLEASE HELP....