@kit1c2000 Hi, to assist you efficiently, I've forwarded your case to the TP-Link support engineers, who will contact you with your registered email address later. Please pay attention to your email...

@JamesJJ Hello, thanks for posting on TP-Link Community. Please try to download the latest firmware and update it to see if the problem still exists: Firmware Download for Archer AX50

@Lem123 Please let us know if the problem still exists after updating the firmware, if so, please also try to turn off DHCP Server on the extender to see if it helps.

@Help2023 Hi, please turn off DHCP Server on the extender to see if it will work fine. Besides, after you unplug the extender and PC internet works again, if you turn on the extender again, will PC...

@sonn Please provide model no. and hardware version of your device.

@MV84 Hi, The MR400 is using with a SIM card now instead of Ethernet WAN, right? Please check Internet IPv4 address on Advanced->Status->Internet part to confirm if it is a public IP or private...