SL Wireless issues

Hello all, I purchased a few SL fans recently and all have worked fine except 1. It's connected on the back in a pair of 2, but for some reason the bottom of of the pair won't light up. It will turn on and spin, but none of the lighting affects apply. I've tried switching the fans around and the bottom always fails. I returned the bottom one at first, but the replacement does the same. This leads me to think it's a software issue perhaps, but idk.

Thanks for the help!