Until the release and installation of the latest firmware (version 1.4.9 Build 20250110 Rel. 65349), my home network using the Deco X55 Pro system was running smoothly and without issues. However, since updating to this firmware version, my network is no longer functioning properly.

Specifically, two of my satellite units (see attached screenshot) are permanently offline. They cannot be reconnected either via Wi-Fi or via a wired connection. Both units are powered on and located within range of the main Deco unit, which continues to operate normally. All attempts to reconnect or reset the satellite units have failed.

Please let me know if this issue is a known problem related to the current firmware version. If so, I kindly request an urgent solution or, if possible, the option to roll back to the previous, stable firmware version.