Horizontal lines on Display/ Screen

[Jrnr]

Hi did anyone experience any horizontal lines on the Xz1 display? It appeared and then faded away.... 

Not sure what made it appear?

It recently came back from repair.... Not sure if they did something wrong🤔

[4ce]

I have the same exact issue with my xz1 blue. Just had the phone for 3 weeks and was very awesome unt this lines came up..

I'm really not bothered with it when playing games because it only appears to light color backgrounds. I was already on the process returning it but the lines never came back again just today. If it really doesn't come back I'm not sure what fixed it. But on the other side it's ok for me since I don't have to suffer without a phone for 1 month 

[GoodDoctor]

Hi. I'm getting a Xperia XZ1 for a little cheaper price in my country but has the same horizontal black dim. Do you think I should buy the phone anyway? Do you think if I buy this phone then in future the screen may become dysfunctional or develop more spots? Or it will remain the same and won't increase in size and color. Please guide me. Thank you. 

[Jr8]

The lines dont increase, It fades away. Display will be the same 

[GoodDoctor]

Can you please tell me what is causing this horizontal black dim in the center of the screen? Are these dead pixels? Is it backlit problem? or is it problem of air bubble? Please guide me.