I'm mentioning this just in case someone else has seen something similar and found a cause - I have "fixed" the problem with brute force (I re-wrote the rule and deleted the old one).
I have several motion lighting rules that are nearly identical. They are all for rooms that have one or more lights controlled by a Lutron Dimmer (or Dimmers). Each room has one motion sensor (one is a SmartThings, one is a Sylvania, and two are Eria). The rooms are adjacent to it is easy for me to test whether the rules are working (I can trigger all four by walking in a circle through all four rooms).
Yesterday I noticed the rule for the Living Room didn't seem to be working. I looked at the logs and I could see the Motion sensor for that room going active when I walked in and then going inactive when I left. The light never came on.
I re-booted the hub. Symptoms stayed the same.
I went into the rule to make sure I hadn't done anything to it. I made sure I hit done as I backed out after reviewing everything. No change in the symptoms.
I checked to make sure I could turn the lights on and off using the Pico (these lights are on a Lutron plug-in dimmer). They worked. Still the Motion lighting rule did nothing.
I checked to make sure I could turn the lights on and off using the buttons on the device page. I could. Still the motion lighting rule did nothing (but the motion sensor would go active each time I walked in the room).
I have another rule that turns on the same lights when the front door opens, so I opened the front door. The lights came on. I let them time out, they switched off (per the rule) after the door had been shut for five minutes. I walked in the room - no lights (logs still showed the activity from the motion sensor).
Extremely exasperated, I wrote a new rule that was identical to the old rule except I appended a 2 to the name. I then deleted the original rule and changed the name of the new rule to remove the appended 2, and saved it.
I walked into the living room and the lights went on.
I'm glad it's working but I still can't figure out what the problem was.
The only problem I have experienced with Motion Lighting previously has been when the motion sensor "sticks" in active. The Eria has done that several times. This room has the SmartThings motion sensor and it was not stuck in active.
During all this testing the other three rules worked every time I walked into those areas.
It seems very odd. I feel like I must have overlooked something . . .
