I was searching for a solution of my problem now over one year...
Problem:
I have a repeater (tried several models, even Asus RP-AC66u, using now a TP-Link RE500):
This Repeater was linked with the RT-AC88U on 2.4Ghz Wlan.
With Asus-Firmware 380.3341 everything worked fine.
Repeater got a...