I also have the same problem!
I don't know if you speak German but you can use Google!
you can see my post and my Pictures!
The photos show the XZ1 and as comparison the HTC U11! (You can see the difference!)
I'm now since six weeks in fight with my Support!
I don't want accept this "problem"!
It's my second XZ1 after the first XZ1 had many other problems.
Here my Photos...