iPhone SE "line" on lock screen

[azathulhu]

I bought the iPhone SE a week ago and I noticed that it sometimes shows this strange line on the lock screen where the notifications boxes begins (pictured). It only happened a number of times and mostly between using Whatsapp web client and checking the phone, so the notification is gone by reading it on the browser. When I unlock the phone it disappears. Is this a bug or a hardware issue?

 

[myrtlebee]

I would assume this is not a hardware issue if you were able to capture it in a screenshot. If there was something physically wrong with the screen itself you would not be able to capture it in a screenshot.

 

[addamas]

Well I have sometimes that line but after I dismiss a notification, so somehow it can be a animation glitch

 

[Kidder1994]

Same happens here with my iphone 6S, looks like a software bug... nothing to worry about.