I have two motion sensors (Smart Things) configured exactly the same in the same motion zone group, yet one sensor keeps writing its battery level to the log whereas the other one does it much less frequently. Logging is configured the same on both. Any idea why it's doing that?
If I had to guess, you might be on the edge of signal with one and not the other? Or maybe it's being really chatty. Try readding it? Do you have something that's polling or another rule using one and not the other that may force it to report more? Not meeting conditions.