My brand new Xperia 1 flickers when moving between apps. It's worse on some apps more than others e.g third party apps and also if video is playing a screen flicker will happen when moving to other apps. 

I've tried factory reset. The reason this stands out is that my 1st Xperia 1 didn't do it, this phone I have now is a replacement and there is definitely a difference. 

Except for that phone works very good, and I'm happy with everything else. 

Regards.