Hello,
I have been having a lot of zigbee ( Hue motion sensors ) issues since 2.3.5.115 on one of the C-7 hubs that I have, I think it started since updates for C-8 releases (?) , but mainly since I updated the hub to 2.3.5.115, and then 117, and 121
I have tried multiple times to re-pair the Hue Motion sensors to the above mentioned hub, sometimes the motion sensors showup in the zigbee discovery, but don't update values (Illuminance, motion, etc), and other times they dont even get discovered. irrespective of anything the values are not getting updated.
I also changed to fresh batteries, just to try my luck with different batteries, but no joy 
I have tried the usualy ideas of turning off the zigbee radio for 30 minutes, turning off the hub for 30 minutes, but still no dice
I have a dev hub which is still on 2.3.5.110, and when I tried pairing the sensors to the dev hub the sensors connect very easily and normally and also update values as they have been reliably for so long.
I also have another hub which has different hue Motion sensors connected to it, and (thankfully) that C-7 hub is not seem to be affected by this issue, the hue motion sensors on that hub are working normally, even after all the updates.
to try to figure out the issue, I tried using hubitat diag tool to go back to 2.3.5.117 ( that is the earliest one I can go to ...but didnt help either.
Is there a way for me to go back to 2.3.5.110 on this hub to try to fix it ?
Or any thoughts ideas to resolve would be welcome..
Thanks