The problem was caused because the IP v6 was activated.

@Kevin_Z I mean that I cannot access the main router while I'm connected to the access point. Both logs that the WAN led is blinking (the first log appears in main router) The access point is...

The router is still disconnecting from WAN. But, I notice that when the connection drops, the access point router cannot find the main router in the local area. And after I do a reboot on access...

@Ivaylo thank you! I will check the log tomorrow

Hello, my Tp-Link router frequently disconnect from WAN. I don't think it is an issue from ISP, because with the old router I didn't face this problem. My setup is made of 2 AX10 routers. First is...