@edwinzulkarnen do you have any recommendation?

Actually after few days testing, the problem is still there. Some Devices could not find 2.4G or 5G signal sometimes. It must be the update of the firmware. So the only thing I can do is to wait for...

I have 6 Archer AX73 routers (US) in Indonesia and mesh them all in one internet, I don't why we only have US version here but it doesn't matter. Everything was good before I updated them on Firmware...