Question Z-Fighting Occurs at play and disappears after I collision

I have a strange issues with Z-Fighting, I have those lines on the ground layer however they are not through the whole ground layer, only in some areas. The appear an flicker as soon as I press play, however the strange thing is that, after I move the character into a wall (or anything with collision) for like 1 second, they disappear completely and everything is fine. I literally have no idee why it has this strange behaviour. Because its not on every map. There are scenes in which I used the same tiles on ground layer and the flickering lines do not appear at all, even if the area is relatively small or big.
I searched everywhere and found nothing about it.

 

create sprite atlas and set padding = 2

 

And to change the padding can be done only with sprite atlas? Is there any other way? (I am pretty new in Unity)

 

yes you can add manually but if you are new its added auto with atlas