Unknowing lags on camera app

[MmZs]

I recently bought a brand new Xperia 5. It was just fine until yesterday which I saw some unknowing lags during taking photo in camera app .
When I swich to manual mode it goes just fine, but in auto mode there are always lags during taking photo.
I tryed reseting camera app and even factory reset, but the problem doesn't gone!

I don't know what should I say, I spen 650€ for this phone and such a problem is unacceptable for me!

[najodleglejszy]

@MmZs  what kind of lag are you talking about? low framerate in the viewfinder? delayed reaction to touch? phone slowing down when taking a picture?