After power-cycle one of the satellite unit, all the wired devices are shown as online now. Case closed. Some tricky bug in the software somewhere.

@Ryan Thank you for your reply. The wired devices are not using randomized MAC addresses. There is no configuration or software to mask MAC addresses. Here are the description of wired devices on...

Got Deco XE75 Pro 3-pack setup. Everything went smoothly except that the wired devices connected to satellite units are always shown as offline in Deco app. Wired devices connected to main unit are...