Funny - I just had the same thing happen. This was my first powerup in the yard this season and I had one express just go wonky with flickering and other strange things happening. I bench tested and hooked up lights to all my expresses back in August. I tested with both wired and wireless. I have not looked at it yet as I just replaced it with a spare that is running perfect. but when I powered off to reset and then repowered it, the address changed from 113 to 001. I've never had that happen in years of use with LEs. This unit is a V4. It is going to sit in the re-evaluate pile until after the show is completely running.