@Solla-topee At first thought it was my main router problem, also tried my main router running normally, no problem. I searched the Internet and found that many people have the same problem as me.

@Solla-topee Brand new, it will be disconnected after a while, it needs to be restarted to run normally, and it will be disconnected after a while, it needs to be restarted repeatedly every day, and...

very very very unstable TP-Link AC2600 WiFi Extender(RE650)