Hello all, I've bought extender RE305 from TP-Link. I am trying to set up the repeater correctly, but for some reason it does not want to connect to 5 GHz network of my main router. It connects to 2,4

I bought this product 1 year ago, and everytime I used it my TP-Link couldn't connect to the 5Ghz signal after 1 or 2 hour and my connection became really slow. It's maybe because of my firmware. I tr