Raspi3 + hifiberry dac+ loose wlan connction

[Swif1t]

Hi, can anyone help?
When i use the app or browser to controll my raspi 3 (with runeaudio ) , then every time it disconnect wlan from my Router ( fritzbox)
When i power off the raspberry an on again , it works for some minutes.
I tried volumino this works! But i want runeaudio witch works.
Greetings:
Swif1t

[hondagx35]

[Swif1t]

Hi Frank,
it`s build in wifi,
and here the Data:
http://pastebin.com/jP3zNFE8

Swif1t

[hondagx35]

[Swif1t]

O.k i try
Thank you