@Joseph-TP Thank you for you reply. The signal starts falling off after around 5 meters and is nearly gone after 15 (open doors, no thick walls). But as I said, everything worked fine before the new...

Since the firmware update (1.4.1 Build 20250821 rel.70686(4555)) of my AX55 V1 (Archer AX3000) Wi-Fi router, the signal strength has deteriorated significantly. Locations that previously had full...