Logs show entries for devices connected to other configs

I noticed several entries on my router's config for devices that have their own config. I'm not sure if this is a bug, a feature, or something else.

I have a default config that my router uses via CLI to provide a baseline of coverage. IP is linked. My laptop and phone each have their own config. I use the Apple Configuration Profile on my MacBook Pro and confirmed it's active in the Network interface list and in the Profiles section in System Preferences. My Pixel 4a uses Android 12's built-in private DNS functionality and can confirm it works, too. Browsing on either device while connected to my home network as the NextDNS log auto-updates shows traffic to sites I'm visiting in real-time, so I'm confident they're connected to the correct config and all is wired up correctly.

Curiously, when either device is connected to my home network, some traffic from these two devices appears in the router's config log, not the respective device config log. Because I'm running NextDNS CLI on my router, I can see the traffic is coming from each device's local IP address. It's not a lot of traffic, sure, but it's unclear to me if this is a bug or working as intended. To add to the confusion, some domains like clientservices.googleapis.com appear in both config logs about the same time and the domains affected aren't blocked/allowed on either config; they're regular, unfiltered traffic.

Thoughts?