Like some people, I've had a few issues since I migrated from my old C-5 to a new C-8. My Hue Outdoor Motion Sensor dropped off repeatedly. But, I finally seem to have hit the correct steps that keep it active and connected. This post isn't about that.
This morning while I was out walking the dog, the hub notified me that a zigbee contact sensor on a bedroom window had a dead battery. When I got home, I climbed up on a step ladder to get the sensor off the window. I had mounted the sensor part with velcro to make it easier to get down. It's up high behind a blind, and it's hard to change the battery in place. Also, I do not enjoy high places. I pulled it off, brought it down, and changed the battery. Then I went back up the stepladder and stuck it back to the window, rather blindly because — as I may have mentioned — I don't like ladders (even step ladders).
With my feet back firmly on the floor, I opened the window to check that the contact sensor was now working again. "Closed" it said. I closed the window and opened it again. "Closed." I hit refresh, and config for good measure. Closed the window. Opened the window. "Closed."
Now by this time I was getting a bit... unhappy, shall we say. "Not another zigbee issue," I thought to myself. I may have used adult language. I went back up the stepladder to rip the offending sensor down and beat some sense into it, or some such.
And found that the adhesive on the velcro had apparently partially detached itself and curled to the side, and the sensor had stuck to the little magnet instead of the window frame. When I opened the window, the sensor stayed right where it was, on the magnet. From its point of view, the window was closed.
I fixed the velcro and stuck it back where it belonged. I opened the window. "Open." I closed the window. "Closed." I repeated several times, just for the joy of seeing it work.
Nothing to see here, folks. 
I think we all have a few of those moments, frustration to funny. Thanks.
