"Connection lost"

My internet connection seems ok, and even if I'm close of my wifi box, I randomly lose connection.
I'm having this issue since... ~5 days? And I tried a reboot.
I don't want to have this during a clan war... :c

Am I the only one with this issue?

(sorry for my english)

First things first. Is your wi-fi router a dual band router that transmits in 2.4 ghz and 5ghz? if thats the case you need to divorce the signal. Your phone automatically grabs the faster frequency and you will d/c everytime. Also, if your device has 3g or LTE turn that off because it can also re-connect to cellular data if your wi-fi hits a snag. Im betting the issue is the router tho.