mwan3 handles multiple interfaces. When a new interface comes up, it kicks in. So I think when you plugged in a hardwired client, you restarted it. Then it is looking for one of the track_ip addresses.
Why not start with the suggestion to unblock things in your home network, at least temporarily. If that works, then change the track_ip addresses to things that are not blocked, and reenable your blocking.
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