@junoo I found you posted another thread, and I replied to you there, please check and confirm: https://community.tp-link.com/en/home/forum/topic/575812

@PrzemekPL You may monitor the connectivity first with the wireless security WPA2-PSK, AES. If the issue persists, please try to change the mode to 802.11 b/g/n mixed, then monitor again.

@Green_Nerd Can you please confirm how is the Archer AX50 connected to the network, is it working as a Router or Access Point mode? If it is working as the main router, and "Allow guests to access my...

@Gustavo93 When you connect the WR840N to the TD-8616 LAN with an Ethernet cable, does it display a WAN port unplugged error on the WR840N's web interface page? How about the WAN LED on the WR840N,...

Hello @PrzemekPL Hello, thank you for asking the community. Regarding the 2.4G disconnection issue, try changing the 2.4G wireless security to WPA2-PSK, AES, and choosing the wireless mode to...

@caehiew When the C3150 is working as an AP and using a static IP, it may fail to detect the new firmware online. If there is an option on its web interface page, you can try to change the DHCP to...