How does the behavior of Unity objects depend on the screen resolution?

Question

iOS

In general, I ran into a problem while testing the game. Game objects move differently at different resolutions. For example, on the Free Aspect resolution, the docking of the fences is normal, but on the iPhone 5/5s/se resolution, for some reason, the fence lags behind
. Why is this happening, and, in fact, how to fix it?

Answer 1

If these are UI elements, then like this: