Update on Jul 4th, 2025: The official version 1.4.1/1.4.2 has addressed the phenomenon discussed in this thread and users can check for updates via the AX6000's web interface or through the Tether App

Dear TP-Link It looks like the lastest firmware of 1.2.1 Build 20250221 rel.13966 (4555) has broken the router The router can connect to the internet ok, speedtest/ ping etc from the router interface