Jump from splashscreen to loading screen

I tested my app on iphone 6, the splashscreen worked fine. It went from splashscreen to fading out without a glitch.

when I tried the app on iphone 4, and it didn’t work as expected. It paused for a while, then it jumped down around about 12 to 15 px down. The splashscreen was off centre, then it faded after a few milliseconds.

Can someone explain why? and how can I fix this problem please?

Thanks in advance.

Sorry, found the problem. Being a noobie, I got wrong splashscreen height and didn’t think it was a problem.