Random spot at the corner of row

I see a random spot at the corner of my row ?
What can it be about ?
This happens only on 5.2 inch android device.I have tried it on 4.7 inch iPhone.I do not have a problem at my iPhone.

Hi @ilker1999917lfx - the screenshot is really narrow, was that deliberate?

Is this an issue with the background picture resize mode that you are using?

Is this the background for the screen or something like a row/column/button?