Me and my friend having same problem.
Image freezes time to time.
Z8 looses wifi connection.
Need to change channel to restart WiFi. And sometimes I have to turn WIF off and on again to restart network.
Even if was a wifi drop it should connect back straight away?
Works good wired.
I think it should be a easy fix around.
Not everyone wants to mess around with router setting etc.
I might doing something wrong
Maybe need to set buffering?
Any advice will be fantastic. Thanks again