SetActorLocation causing z-fighting

The tile first spawns at z = -1000 and after that i move it to the desired location, behind the last tile. Bute because i need the y and z to be 0 and not change, i just dont hook them up. I tried to spawn it directly behind the rear tile, but i does the same thing. The tile does not spawn 500 units behind it, but slightly into the rear tile, but at the correct z and y values, which are 0