Troubleshooting to fix issues by the Hubitat community, which also includes Hubitat staff, is only possible/useful when the information required to fix an issue is provided.
For example, after reading @PeterontheMoor's post in this thread, I checked their posting history. While they certainly have documented their issues with the C-8, there was zero followup on their part providing details necessary to address the issue; leading to this post from @mike.maxwell
I have zero doubt that @PeterontheMoor encountered serious zigbee issues with their C-8. Unfortunately, without details on their setup, it is impossible to know the underlying cause, or fix the problem.
