asus ac-rt bug apipa wifi 192.168.50.

I all, I've just bought a router asus rt-ac68u for my new home. The former firmware inside was 3.0.0.4.384_20308-gead790e. For the moment I am living in a small apart hotel, and the wifi is so bad that I decided to use my brand new router to amplify the signal for my android box. So I tried to...