@shx I don't know what is OFDMA, I think my router model doesn't have it (Archer C80)

TP link support sent me an email with a beta firmware for my Archer C80 and by now (3 days) the wifi problem is gone. Thanks

@Kevin_Z I gonna test other names to be shure. SSID displayed in phone app theter or web GUI are correct, I didn't touch any advanced setting because I setup router in phone app and was working great...

I have same issue with my Archer C80, but in this case is a little weird. I have setup 2 networks (*): ARCHER_C80_24G (2.4G) ARCHER_C80_5G (5G) Everything was working great for months, but now, in...