@blackcatz I answer myself a correction just been today Devices with 10/100Mbps Connections Lose Internet After Updating Archer BE800 V1 Firmware to 1.2.1 - Home Network Community

@Kevin_Z I have a problem with my TADO bridge that manages the heating. It is no longer recognized by the router BE800 on the 4 ports 2.5G RJ45. Only on the 10G port but the speed is not known