Trying to troubleshoot some recent odd Zigbee behavior and I'm seeing this in the logs under the location events tab:
Do I have a bad radio?
Wonder if the engineering logs would show more? @bobbyD
Are you new here? 
Obviously I needed to search... hmmmm.... this is new to my C8. The C8 is an early model but I only recently put it in service. I don't see any specific device zigbee or Z-wave that seems to be spamming. I have no clue where to begin to look. Never had this issue on the C7. Wonder if the C8 Pro would be more stable?
Nope. I've never had a C-8[Regular], but my C-7 was much better than my C8P re: Zigbee. If I was even slightly less lazy, I'd move all my Zigbee devices back to my C7 and Hub Mesh them.
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Well that's disappointing that they don't have a fix. I did just find a motion sensor whose LED was lighting on movement but it wasn't reporting to the hub. It showed about 65% battery but I replaced it anyway and now it's happy. Also a Z-wave kitchen motion that is currently configured but not being used that was stuck in a motion active condition. It showed 85% but I replaced that battery and it is no longer stuck. Will see if any of that makes a difference.
They wouldn't, unfortunately.
Firmware update for the C8P is out in beta testing, which should address some of the incidents reported with the Zigbee radio. 
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I'll be testing that when my Pro arrives Wed and I migrate the C8.
My rock solid ZB radio has been spewing Offline log entries now for 2 weeks.
No reason I can think of.
Just the "Pro"?
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Will the firmware update also include the C8 non-Pro?
(Is there a Zigbee or Zwave hardware difference between the C-8 pro/non-pro?)
Thanks!
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Is this out in the current beta builds or in a separate beta test group?
I only ask as I have not seen my Alert for poor ZB channel waver.
Edit: Thanks to @thebearmay pointing out the firmware upgrade switch.
I was under the impression that was for me to upload a hex file if I wanted to.
Upgraded.
